Add license type: contains GPL = RESTRICTED license am: 0731548b21

Change-Id: Ib55adfde7e1c09120b61848611a0b3173c55ff7e
diff --git a/METADATA b/METADATA
index 7569c7c..9ef326e 100644
--- a/METADATA
+++ b/METADATA
@@ -10,6 +10,7 @@
     value: "https://github.com/apple/cups/releases/download/v2.3.1/cups-2.3.1-source.tar.gz"
   }
   version: "v2.3.1"
+  license_type: RESTRICTED
   last_upgrade_date {
     year: 2019
     month: 12