Add Linux QuadroP400 bots.

Bug: skia:6882
Change-Id: I9514af6aa710f1722be277a529acd1d88ed32bc9
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/26364
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
3 files changed