exclude android*.jar files from *.aar output

widgets/build.gradle

@@ -51,12 +51,18 @@ android {
     }
 }
 
+android.libraryVariants.all { variant ->
+	variant.outputs.each { output ->
+		output.packageLibrary.exclude('libs/android-runtime.jar')
+		output.packageLibrary.exclude('libs/android-binding-generator.jar')
+	}
+}
 dependencies {
 	compile fileTree(include: ['*.jar'], dir: 'libs')
 	testCompile 'junit:junit:4.12'
 	compile 'com.android.support:support-v4:+'
-	compile files('libs/android-runtime.jar')
-	compile files('libs/android-binding-generator.jar')
+	compile files('extlibs/android-binding-generator.jar')
+	compile files('extlibs/android-runtime.jar')
 }
 
 task cleanDistDir (type: Delete) {