Add METADATA to spirv-headers: MIT=NOTICE am: 2cb335583c am: b8530f4af8 am: 36d9c93da9 am: bdd05e9c9f am: 823eccbef3

Change-Id: Ia111ca96a6eea97b8f8251a036299d4e82c43734
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
+}