ProgramGL: don't bindAttribLocation builtin attributes
ProgramGL: don't bindAttribLocation builtin attributes

BUG=angleproject:1636

Change-Id: Idea0e4f4a4415351b83e8f1a39b697139ff9ebe6
Reviewed-on: https://chromium-review.googlesource.com/414205
Commit-Queue: Corentin Wallez <470c533e86f4f848c98c7e11fffc2d043494a401@chromium.org>
Reviewed-by: Geoff Lang <b6fc25fe0362055230985c05cbfa8adb741ccc0f@chromium.org>

ecoal95/angle,ecoal95/angle,ppy/angle,MSOpenTech/angle,ecoal95/angle,ppy/angle,ppy/angle,MSOpenTech/angle,ppy/angle,ecoal95/angle,ecoal95/angle,MSOpenTech/angle,MSOpenTech/angle