- only download bullet when its supposed to be built

jme3-bullet-native/build.gradle

@@ -132,11 +132,13 @@ unzipBullet.dependsOn {
 }
 
 compileJava.dependsOn {
+    if(buildNativeProjects=="true"){
         def bulletUnzipDir = new File(project.projectDir.absolutePath + File.separator + bulletFolder)
         if (!bulletUnzipDir.isDirectory()) {
             unzipBullet
         }
     }
+}
 
 // Adds all available binaries to java jar task
 binaries.withType(SharedLibraryBinary) { binary ->