[infra] Specify GPU driver version in task dimensions.

Bug: skia:6637
Change-Id: I3f692e95efad4079f69fc451c7d4a4b2b8b5df63
Reviewed-on: https://skia-review.googlesource.com/19808
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ben Wagner <benjaminwagner@google.com>
2 files changed