Merge pull request #2 from morphis/for-upstream/separate-compat-and-hybris

Separate into libhybris and android compatiblity layer
egl: export number of used buffers in offscreen window implementation

Signed-off-by: Simon Busch <morphis@gravedo.de>
egl: implement identifier field for an offscreen buffer

Signed-off-by: Simon Busch <morphis@gravedo.de>
egl: explictly mark deprecated windowing API as deprecated

Signed-off-by: Simon Busch <morphis@gravedo.de>
Implement binding for Android's libui library through a simple compat library

Signed-off-by: Simon Busch <morphis@gravedo.de>