Add 8 more Linux builders to the linux_gpu configuration.
Add 8 more Linux builders to the linux_gpu configuration.

This completes the planned set of Linux builders.

BUG=335851

Review URL: https://codereview.chromium.org/188283002

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@255226 0039d316-1c4b-4281-b951-d872f2087c98

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