[Provingground] Make touch_firmware_versions handle umaro.

Allow variables without ' or " around their values.
Make same exception as exists for lulu due to a typo.

BUG=None
TEST=same output as before, except umaro is included now

Change-Id: I3a5e222294c662b2e0c98b725bce24482c66a6ab
Reviewed-on: https://chromium-review.googlesource.com/357160
Commit-Ready: Katherine Threlkeld <kathrelkeld@chromium.org>
Tested-by: Katherine Threlkeld <kathrelkeld@chromium.org>
Reviewed-by: Charlie Mooney <charliemooney@chromium.org>
1 file changed