Compatibility ndk r9d armeabi-v7a-hard APP_ABI building.
Merge pull request #238 from beaumanvienna/retrorig-pl1

dual head support (SDL_VIDEO_FULLSCREEN_HEAD) for Qt and SDL2
Merge pull request #240 from i25ffz/master

Compatibility ndk r9d armeabi-v7a-hard APP_ABI building.