toolchain_utils_githooks: Add line-length to black

This fixes the autofix command so that we enforce a line length
of 80 chars.

BUG=None
TEST=Checked presubmit on violating file

Change-Id: If8817cdf9ab70d5d9e5db10c0818207f976f519c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/3958135
Reviewed-by: George Burgess <gbiv@chromium.org>
Auto-Submit: Jordan Abrahams-Whitehead <ajordanr@google.com>
Tested-by: Jordan Abrahams-Whitehead <ajordanr@google.com>
Commit-Queue: Jordan Abrahams-Whitehead <ajordanr@google.com>
1 file changed