Add GN args for GL/GLES interface

Bug: skia:
Change-Id: I8445a6f3641aa43e7b18832c7c228b66dd321f2d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201616
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
8 files changed