minigbm: run presubmit.sh and add OWNERS file

This now apparently is required.

Change-Id: I28b19684d207aad50493974dc71d8249bc82ca21
Reviewed-on: https://chromium-review.googlesource.com/1633452
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..a6feb04
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,8 @@
+marcheu@chromium.org
+gurchetansingh@chromium.org
+hoegsberg@chromium.org
+tfiga@chromium.org
+ddavenport@chromium.org
+dbehr@chromium.org
+dcastagna@chromium.org
+lepton@chromium.org