ahcsrc: adjustable 'display-orientation' property
Submitted by Justin Kim
Without compensation of the orientation degrees, 'ahcsrc' displays upside-down screen when the android device is rotated left at 90 degrees. This compensation value is available from the android developer site.
I couldn't find a good way to set this value in Java-side while 'ahcsrc' is working so I added a JNI function which was omitted before.