GitLab

Adds a suppressions file for the Dependency Check gradle plugin. Also
improves our error message to make it clearer in the noisy gradle
output.

Bug: 1114909
Change-Id: Iabed86d80c9a68b2e021940eb948074b09161046
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354893
Commit-Queue: Mohamed Heikal <mheikal@chromium.org>
Reviewed-by: Adrian Taylor <adetaylor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797893}