Add release_version as dimension for ChromeOS tasks

This should prevent version skew and allow us to include this in
Gold results/bugs.

Bug: skia:
NOTRY=true
Change-Id: I9edacbb478e310eca39d2b56ac2059f26b0cb127
Reviewed-on: https://skia-review.googlesource.com/79940
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Reviewed-by: Stephan Altmueller <stephana@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
2 files changed