add DIR_METADATA settings

Change-Id: I104e667a354591b35c50902dd84917910b90d2d2
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/3301422
Reviewed-by: Mark Mentovai <mark@chromium.org>

DIR_METADATA

@@ -0,0 +1,13 @@
+# Metadata information for this directory.
+#
+# For more information on DIR_METADATA files, see:
+#   https://source.chromium.org/chromium/infra/infra/+/HEAD:go/src/infra/tools/dirmd/README.md
+#
+# For the schema of this file, see Metadata message:
+#   https://source.chromium.org/chromium/infra/infra/+/HEAD:go/src/infra/tools/dirmd/proto/dir_metadata.proto
+
+monorail {
+  project: "google-breakpad"
+}
+
+team_email: "google-breakpad-dev@googlegroups.com"