Merge changes from topic 'emu-glsync-guest-v2'

* changes:
  More efficient swapBuffers
  Implement EGL_KHR_fence_sync/EGL_ANDROID_native_fence_sync for emulator
  Add backing implementation of EGLSyncKHR objects
  Add DEBUG_EGL / DPRINT macros for debug logging EGL.
  Goldfish sync driver user-space interface
  Add encoder entries for EGL_KHR_fence_sync
  ANDROID_EMU_ASYNC_SWAP extension searching + setting
tree: 3fc58d164bf736da75f085af3fa2e97e2b281738
  1. host/
  2. shared/
  3. system/
  4. tests/
  5. Android.mk
  6. common.mk
  7. README