Add EGL_KHR_get_all_proc_addresses to extension string

We've had the extended behavior since Android 4.3, but the extension
hadn't been ratified by Khronos yet so we couldn't add it to the
extension string.

Bug: 9681677
Change-Id: I78842316a3ab7a3f66a0ac1a4742d837de664c4c
2 files changed