Add METADATA to avb: Apache2+MIT+BSD=NOTICE am: 57769d6825 am: 3dba77a07a

Change-Id: If9838e926ddc7478f481d5efb52d97bbd8e4b1c6
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..d97975c
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,3 @@
+third_party {
+  license_type: NOTICE
+}