Port to ANGLE's GN files

Bug: skia:7647
Change-Id: Ic4709817804610783de8ff3d9eaa32f57fb72729
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/313316
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
3 files changed