Launch4j maven plugin fails to set the execute permissions if the "workdir" contains spaces. This only affects non-Windows systems.

How to reproduce:
On a non-Windows system execute mvn -Dmaven.repo.local="maven repo with spaces" package
Using this pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>sample</groupId>
    <artifactId>sample</artifactId>
    <version>1.0-SNAPSHOT</version>

    <build>
        <plugins>
            <plugin>
                <groupId>com.akathist.maven.plugins.launch4j</groupId>
                <artifactId>launch4j-maven-plugin</artifactId>
                <version>1.7.7</version>
                <executions>
                    <execution>
                        <id>launch4j-console-exec</id>
                        <phase>package</phase>
                        <goals>
                            <goal>launch4j</goal>
                        </goals>
                        <configuration>
                            <headerType>console</headerType>
                            <classPath>
                                <mainClass>sample.MainClass</mainClass>
                            </classPath>
                            <jre>
                                <minVersion>1.7.0</minVersion>
                            </jre>
                            <versionInfo>
                                <fileVersion>1.0.0.0</fileVersion>
                                <txtFileVersion>${project.version}</txtFileVersion>
                                <fileDescription>${project.name}</fileDescription>
                                <productVersion>1.0.0.0</productVersion>
                                <txtProductVersion>${project.version}</txtProductVersion>
                                <copyright>copyleft</copyright>
                                <productName>${project.name}</productName>
                                <internalName>${project.artifactId}</internalName>
                                <originalFilename>sample.exe</originalFilename>
                            </versionInfo>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

Build fails and console output contains an exception:

[ERROR] 
net.sf.launch4j.BuilderException: net.sf.launch4j.ExecException: java.io.IOException: Cannot run program "/home/iheinrich/sample/maven repo/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres": error=13, Permission denied
    at net.sf.launch4j.Builder.build(Builder.java:146)
    at com.akathist.maven.plugins.launch4j.Launch4jMojo.execute(Launch4jMojo.java:336)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:355)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:155)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:216)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:160)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: net.sf.launch4j.ExecException: java.io.IOException: Cannot run program "/home/iheinrich/sample/maven repo/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres": error=13, Permission denied
    at net.sf.launch4j.Util.exec(Util.java:160)
    at net.sf.launch4j.Cmd.exec(Builder.java:212)
    at net.sf.launch4j.Builder.build(Builder.java:96)
    ... 22 more
Caused by: java.io.IOException: Cannot run program "/home/iheinrich/sample/maven repo/net/sf/launch4j/launch4j/3.8.0/launch4j-3.8.0-workdir-linux/bin/windres": error=13, Permission denied
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
    at java.lang.Runtime.exec(Runtime.java:617)
    at java.lang.Runtime.exec(Runtime.java:485)
    at net.sf.launch4j.Util.exec(Util.java:128)
    ... 24 more
Caused by: java.io.IOException: error=13, Permission denied
    at java.lang.UNIXProcess.forkAndExec(Native Method)
    at java.lang.UNIXProcess.(UNIXProcess.java:187)
    at java.lang.ProcessImpl.start(ProcessImpl.java:130)
    at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
    ... 27 more