Merge changes I47e6458d,Ie3c451ef,I5d17f530,I4ed5132d,I9af84dcb, ... into studio-1.3-dev
* changes:
emugl: Add *experimental* support for 'osmesa' backend.
emugl: GLDispatch: do not use static function pointers.
emugl: Get rid fo GLAPIENTRY
emugl: Refactor GLDispatch structure.
emugl: Refactor libOpenglRender's EGLDispatch.
emugl: Remove obsolete header file.
emugl: Reduce number of exported dynamic symbols.
android/build: Add support for LOCAL_SYMBOL_FILE
android/scripts/gen-dll-wrapper.py: Remove obsolete script.
android/scripts/gen-entries.py: Add new script.