Merge changes from topic "egl1.5-master"

* changes:
  Add EGL 1.5 Sync functions
  Add eglCreatePlatformWindowSurface
  Early exit to prep for refactoring
  Implement getPlatformDisplay with ANGLE support
  Implement eglCreateImage and eglDestroyImage
  Determine EGL version
  Generated EGL 1.5 support
  Update EGL headers to version 1.5