llvm_tools: abandon CLs after completing LLVM bisection.

Abandon CLs created for bisection if LLVM bisection successfully found
the root cause.

BUG=chromium:1081457
TEST=Verified locally.

Change-Id: I3702c38432fbaf87f7df62418c0b29cbe4ca722a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2382420
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: George Burgess <gbiv@chromium.org>
Tested-by: Jian Cai <jiancai@google.com>
2 files changed