eclass-overlay: Add pluginvm to cups-proxy group

The Plugin VM dispatcher needs access to the CUPS proxy socket,
so let's add its user (pluginvm) to the cups proxy group.

BUG=b:117218264
TEST=Build and boot

Cq-Depend: chromium:1820011
Change-Id: I52cfe1179b76f75c8d689f631584abef93608c75
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/eclass-overlay/+/1820182
Reviewed-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Dmitry Torokhov <dtor@chromium.org>
Tested-by: Dmitry Torokhov <dtor@chromium.org>
1 file changed
tree: 13613935f2a9b7879065814ef9277beba0222d52
  1. OWNERS
  2. PRESUBMIT.cfg
  3. eclass/
  4. metadata/
  5. profiles/