Add tricium.config

This enables the feedback button in tricium comments.  Adding here so
that subprojects can inherit instead of adding to every project where we
turn on tricium.

BUG=chromium:856733
TEST=None

Change-Id: I372f71c1d4d145cf08e03444a9182455cd480adf
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/+/1680597
Tested-by: Benjamin Gordon <bmgordon@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
1 file changed