We were not calling eglTerminate to clean up.

Change-Id: I022d8158c6dc041664d4b9c01295a67c9760b245
Reviewed-on: https://chromium-review.googlesource.com/256730Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>