macOS arm64 builds only create the x64 gen_snapshot by default because
they are cross-compiled in Rosetta. Adding the gen_snapshot target
ensures that we have a gen_snapshot for arm64 as well.
These bots require clang which currently isn't provisioned on shards, so
they are running on the main bot.
Cq-Include-Trybots: luci.dart.try:vm-kernel-precomp-nnbd-mac-release-arm64-try
Change-Id: I842f37019a65dfb30e522d2d9bead5e62bb3ff79
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/204505
Reviewed-by: Siva Annamalai <asiva@google.com>
Reviewed-by: Jonas Termansen <sortie@google.com>
Alexander Thomas
41aa60ea2b