Add support for cross-compiling x86-64 binaries on M1 Mac.

Change-Id: I5e4216aef7d1dca2dfc54dc1228d0fd614e5960e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/648296
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
1 file changed