In D3D9, sometimes the compiler would return the same shader
pointer on different calls to compile, if the programs were
similar. Work around this quirk by storing an applied serial
for the program, so we know when to refresh uniform data.

BUG=angle:661

Change-Id: I9750ee2298701dbe3f121dac6626198d24a2d1b2
Reviewed-on: https://chromium-review.googlesource.com/201562Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Jamie Madill <jmadill@chromium.org>