Move comment to license_note

Comments not preserved during refresh.

Test: m nothing
Change-Id: Ifb0356ca49796b89446a50918bae95069b9c5fb4
diff --git a/METADATA b/METADATA
index cdcfa70..5a356a4 100644
--- a/METADATA
+++ b/METADATA
@@ -1,6 +1,4 @@
 third_party {
-  # would be UNENCUMBERED save for
-  #  tests/combine_maps.py
-  #  build/soong/
+  license_note: "would be UNENCUMBERED save for: tests/combine_maps.py and build/soong/"
   license_type: NOTICE
 }