Ignore unknown-pragmas warning of clang

This was previously ignored through Chromium until
https://chromium-review.googlesource.com/984113

Bug: None
Change-Id: I4bc402e32d888fc2536ad69c832130c4086b5adb
Reviewed-on: https://webrtc-review.googlesource.com/66040
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
1 file changed
tree: ac7b3d6290a830962bc1428dfa4c07fe57508fef
  1. License/
  2. Samples/
  3. BUILD.gn
  4. codereview.settings
  5. OWNERS
  6. README.webrtc