llvm_tools: update repo manifest by default for llvm upgrades

We need to make manifest changes to apply llvm upgrades now. The
update_chromeos_llvm_hash script already supports this but by putting it
behind a flag it is easy to miss (especially since it wasn't necessary
until relatively recently). This CL makes it automatic for non-llvm_next
updates.

BUG=None
TEST=llvm_tools/update_chromeos_llvm_hash_unittest.py

Change-Id: I78ea436ea7e1f52bac00ede55b46705ae13dd03e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/5373412
Reviewed-by: George Burgess <gbiv@chromium.org>
Commit-Queue: Ryan Beltran <ryanbeltran@chromium.org>
Tested-by: Ryan Beltran <ryanbeltran@chromium.org>
2 files changed