clang upload script: Run mac-arm64-rel try bot on compiler rolls.

This will make sure compiler updates don't break the mac-arm64-rel bot.
The bot currently only builds and doesn't run tests, but it's a start.

Bug: none
Change-Id: Ifbd15713c541aa62339a2ef6b72e009527716c92
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2372724Reviewed-by: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801014}

tools/clang/scripts/upload_revision.py

@@ -39,7 +39,7 @@ Cq-Include-Trybots: chromium/try:linux_chromium_chromeos_asan_rel_ng
 Cq-Include-Trybots: chromium/try:linux_chromium_chromeos_msan_rel_ng
 Cq-Include-Trybots: chromium/try:linux_chromium_compile_dbg_32_ng
 Cq-Include-Trybots: chromium/try:linux_chromium_msan_rel_ng
-Cq-Include-Trybots: chromium/try:mac_chromium_asan_rel_ng
+Cq-Include-Trybots: chromium/try:mac-arm64-rel,mac_chromium_asan_rel_ng
 Cq-Include-Trybots: chromium/try:win-angle-deqp-rel-64
 Cq-Include-Trybots: chromium/try:win-asan,win7-rel,win-angle-deqp-rel-32
 Cq-Include-Trybots: chrome/try:iphone-device,ipad-device