llvm_tools: Make skip_dependencies optional

This CL makes new skip_denedencies arg in get_upstream patch default to
False so that the new behavior introduced in CL:3255665 is disabled by
default. This is intended to fix a failure in the nightly revert checker
that was preventing cherry_picks.

BUG=b:206461485
TEST=Local test of get_upstream_patch.py, and
nightly_revert_checker_test.py

Change-Id: Ia7586b69f9aefb5ca820a60eed593d45a4b9a5bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/3282951
Reviewed-by: Christopher Di Bella <cjdb@google.com>
Commit-Queue: Christopher Di Bella <cjdb@google.com>
Tested-by: Christopher Di Bella <cjdb@google.com>
Auto-Submit: Ryan Beltran <ryanbeltran@chromium.org>
1 file changed