Add metadata files for itertools.

Bug: 155309706
Change-Id: Iea48d273607e7a3942a26779a23ee023346eb588
diff --git a/METADATA b/METADATA
new file mode 100644
index 0000000..a2c5dd7
--- /dev/null
+++ b/METADATA
@@ -0,0 +1,19 @@
+name: "itertools"
+description: "Extra iterator adaptors, iterator methods, free functions, and macros."
+third_party {
+  url {
+    type: HOMEPAGE
+    value: "https://crates.io/crates/itertools"
+  }
+  url {
+    type: ARCHIVE
+    value: "https://static.crates.io/crates/itertools/itertools-0.9.0.crate"
+  }
+  version: "0.9.0"
+  license_type: NOTICE
+  last_upgrade_date {
+    year: 2020
+    month: 12
+    day: 21
+  }
+}