Add rmcilroy@chromium.org to src/OWNERS.

BUG=
R=danno@chromium.org

Review URL: https://codereview.chromium.org/234793002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20673 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

OWNERS

@@ -11,6 +11,7 @@ machenbach@chromium.org
 marja@chromium.org
 mstarzinger@chromium.org
 mvstanton@chromium.org
+rmcilroy@chromium.org
 rossberg@chromium.org
 svenpanne@chromium.org
 titzer@chromium.org