fixed adding temporary files to distribution

CreateFile.java: returns file instead of directory
    updated ZmtShortcutPlugin

src/main/groovy/de/zmt/gradle/ZmtShortcutPlugin.groovy

@@ -41,7 +41,7 @@ public class ZmtShortcutPlugin implements Plugin<Project> {
             
             doLast {
                 if (FileSystems.getDefault().supportedFileAttributeViews().contains("posix")) {
-                Files.setPosixFilePermissions(outputDir.toPath().resolve(resourceName), PosixFilePermissions.fromString('rwxr-xr-x'))
+                Files.setPosixFilePermissions(getOutputFile().toPath(), PosixFilePermissions.fromString('rwxr-xr-x'))
                 }
             }
         }

src/main/groovy/de/zmt/gradle/task/CreateFile.groovy

@@ -9,12 +9,14 @@ import org.gradle.api.tasks.*;
 public class CreateFile extends DefaultTask {
     def resourceName
     def clazz = CreateFile.class
-
-    @OutputDirectory
-    def outputDir = project.file("$project.buildDir/tmp/")
     
     @TaskAction
     public void createFile() {
-        outputDir.toPath().resolve(resourceName).append(clazz.getResourceAsStream(resourceName))
+        getOutputFile().append(clazz.getResourceAsStream(resourceName))
+    }
+    
+    @OutputFile
+    public File getOutputFile() {
+        project.file("$project.buildDir/tmp/" + resourceName)
     }
 }