Added vm[53..72]-a4 to mac_gpu configuration.
Added vm[53..72]-a4 to mac_gpu configuration.

BUG=360364
TBR=iannucci@chromium.org

Review URL: https://codereview.chromium.org/267573010

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@267713 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build