llvm_tot: add an option for recipe builders.

Add an option to launch LLVM TOT builders with recipe builders to
update_packages_and_run_tests.py. The builders launched will not run
hwtests for now.

BUG=chromium:1072063

TEST=local tests.

Change-Id: I1c34090f2d2ea6d9b7efab0a0dccf795396c96d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2157624
Tested-by: Jian Cai <jiancai@google.com>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: George Burgess <gbiv@chromium.org>
3 files changed