Add METADATA to vulkan-validation-layers: Apache2+BSD+MIT=NOTICE am: d5fe90c584

Change-Id: I46218a0f90c8944fe5c98681cc379ed6c2abec20
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
+}