Add glenarrow to GPU BonusConfigs bots

This tests F16 surfaces, and F16 vertex colors (because the sRGB paint
colors used in GMs are often outside the narrow gamut).

Bug: skia:
Change-Id: Ic11840df0c9919a6cca78ab3786ba7a11e879a07
Reviewed-on: https://skia-review.googlesource.com/c/175245
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed