x11-libs/intel-gpu-tools: Use xorg-proto.

Upgrading intel-gpu-tools to upstream 1.22 resulted in undesirable
dependencies so change dependency directly to xorg-proto.

BUG=chromium:837073
TEST=build_packages --board zako

Change-Id: I3d13634edb79d617a0f2033716bac0ac4dd2ca7d
Reviewed-on: https://chromium-review.googlesource.com/1244129
Commit-Ready: David Riley <davidriley@chromium.org>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: David Riley <davidriley@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
2 files changed