depot_tools: add phajdan.jr to OWNERS

BUG=none

Review URL: https://codereview.chromium.org/1670503002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@298586 0039d316-1c4b-4281-b951-d872f2087c98

OWNERS

@@ -9,6 +9,7 @@ maruel@chromium.org
 nodir@chromium.org
 petermayo@chromium.org
 pgervais@chromium.org
+phajdan.jr@chromium.org
 rogerta@chromium.org
 stip@chromium.org
 tandrii@chromium.org