Add an OWNERS file.

This adds a top-level OWNERS file. I don't think any tooling will
enforce OWNERS checks at this point, so this is mostly for
documentary purposes.

Change-Id: Ifb7a9dd40ff3a4805a85d86075aa93fb808d2d31
Reviewed-on: https://gn-review.googlesource.com/2381
Commit-Queue: Dirk Pranke <dpranke@google.com>
Commit-Queue: Brett Wilson <brettw@chromium.org>
Reviewed-by: Petr Hosek <phosek@google.com>
Reviewed-by: Brett Wilson <brettw@chromium.org>

OWNERS

diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..0200965
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,4 @@
+brettw@chromium.org
+dpranke@chromium.org
+phosek@chromium.org
+scottmg@chromium.org