added sksl support for integerSupport cap

Bug: skia:
Change-Id: I7e33af9b845db3f862a3a21cba7f2d56e8ea2909
Reviewed-on: https://skia-review.googlesource.com/24323
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed