Fix chromium autoroller to parse new clang revision format.

TBR=magjed@chromium.org, fbarchard@chromium.org
Bug: None
Change-Id: Idf42e33ab4297c0439710532b4c57cb92d572018
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/1708140
Commit-Queue: Mirko Bonadei <mbonadei@chromium.org>
Reviewed-by: Mirko Bonadei <mbonadei@chromium.org>

tools_libyuv/autoroller/roll_deps.py

@@ -37,7 +37,7 @@ CHROMIUM_LOG_TEMPLATE = CHROMIUM_SRC_URL + '/+log/%s'
 CHROMIUM_FILE_TEMPLATE = CHROMIUM_SRC_URL + '/+/%s/%s'
 
 COMMIT_POSITION_RE = re.compile('^Cr-Commit-Position: .*#([0-9]+).*$')
-CLANG_REVISION_RE = re.compile(r'^CLANG_REVISION = \'(\d+)\'$')
+CLANG_REVISION_RE = re.compile(r'^CLANG_REVISION = \'([0-9a-z]+)\'$')
 ROLL_BRANCH_NAME = 'roll_chromium_revision'
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))