Add inglorion@ to tools/clang/OWNERS

Change-Id: I30dc712af38410fb4b3187253a7441ce897a644f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1707553Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Bob Haarman <inglorion@chromium.org>
Cr-Commit-Position: refs/heads/master@{#678492}

tools/clang/OWNERS

 hans@chromium.org
+inglorion@chromium.org
 pcc@chromium.org
 thakis@chromium.org
 rnk@chromium.org