[tools] Allow update.py to run on mac arm machines
[tools] Allow update.py to run on mac arm machines

Change-Id: I293f493ec10465ec8c2af071aef7aebff44bdf0b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/241692
Reviewed-by: William Hesse <a821cddceae7dc400f272e3cb1a72f400f9fed6d@google.com>
Commit-Queue: Nicholas Shahan <03847abd2d8aadfe859ecb98095a31f9f515dc47@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk