libxkbcommon: Use xorg-proto.

BUG=chromium:837073
TEST=cros_portage_upgrade --upgrade --board=tatl:tael
x11-base/xorg-proto

Change-Id: Id1924dbd92712f3c47133075fdd82baa41b46d8a
Reviewed-on: https://chromium-review.googlesource.com/1244061
Commit-Ready: David Riley <davidriley@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
2 files changed