Corrected source comment.

src/core/android/SDL_android.c

@@ -162,7 +162,7 @@ void Java_org_libsdl_app_SDLActivity_onNativePadUp(
     Android_OnPadUp(padId, keycode);
 }
 
-// Padup
+/* Joy */
 void Java_org_libsdl_app_SDLActivity_onNativeJoy(
                                     JNIEnv* env, jclass jcls,
                                     jint joyId, jint axis, jfloat value)