add cups to lp group

We want cupsd to be able to access USB printers, which will have
group:lp.

CQ-DEPEND=CL:350850,CL:*264046
BUG=chromium:616866
TEST=security_AccountsBaseline on trybot
TEST=print to USB printer with non-root cupsd

Change-Id: I8d1d6988cfbe52572f4be89046c86a21c855d880
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/350771
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
1 file changed
tree: 72c7bc6259a98b00c424746717cf6493fb4bb431
  1. PRESUBMIT.cfg
  2. eclass/
  3. metadata/
  4. profiles/