pixel: Add groups for pixel-specific repos

Since roomservice is not useable here, let's at least give others an
option to remove those repositories from their checkouts.

Change-Id: I31b29cca8964c17bfcd8900c52b79958f3236017
1 file changed
tree: 4dafa79211eff4832e0fd2b2bf37747c64ec8a45
  1. snippets/
  2. default.xml
  3. README.mkdn