Add OWNERS and fix version string

* Fix METADATA version string, which must be d1.d2.d3
  to work with external_updater.

Test: make
Change-Id: I86d4e6a6878915cc538d7ba1f183e1828e4c189d
diff --git a/METADATA b/METADATA
index 623843d..1bef54b 100644
--- a/METADATA
+++ b/METADATA
@@ -11,7 +11,7 @@
     type: GIT
     value: "https://github.com/dtolnay/proc-macro-hack"
   }
-  version: "d29a20e44207f915f42e6d1668d2864b0152e5a8"
+  version: "0.1.4"
   last_upgrade_date { year: 2020 month: 3 day: 17 }
   license_type: NOTICE
 }
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..46fc303
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1 @@
+include platform/prebuilts/rust:/OWNERS