Fail out of date DrMemory build test requests.
Fail out of date DrMemory build test requests.

Also remove extraneous build requests from them by not scheduling ToT
jobs on them too.

R=bruening@chromium.org
BUG=334374
TEST=lcoal start

Review URL: https://codereview.chromium.org/138433005

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@245469 0039d316-1c4b-4281-b951-d872f2087c98

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