Add license_note am: 707a319c5e am: fb0c1c32af am: 140e8f5722 am: 5a9349dcf5

Original change: https://android-review.googlesource.com/c/platform/external/google-fonts/rubik/+/2012355

Change-Id: I19e1b5e41d252f57ce2cad9ec840c88bd12ce97f
diff --git a/METADATA b/METADATA
index aae0b0b..f96c491 100644
--- a/METADATA
+++ b/METADATA
@@ -18,5 +18,6 @@
   }
   version: "94dff3eaa9301b6640cccc63c56d6ff33d82882c"
   last_upgrade_date { year: 2018 month: 12 day: 27 }
+  license_note: "contains OFL fonts"
   license_type: BY_EXCEPTION_ONLY
 }