Turn off warnings as errors in SwiftShader

Might fix the roll?

Change-Id: Ia041e7ee1fe5a3a8740dc3ad06c1e4bf36d0853b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/210426
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Ben Wagner aka dogben <benjaminwagner@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed