SAMZA-1401: update NOTICE for 0.13.1 release with RocksDB BSD+patents license

Please see details in SAMZA-1401.

Author: Fred Ji <haifeng.ji@gmail.com>

Reviewers: Navina Ramesh <navina@apache.org>

Closes #279 from fredji97/rocksdb

(cherry picked from commit 1d253c757c74d5a5364d0b270d037361c60d1ee6)
Signed-off-by: navina <navina@apache.org>
diff --git a/NOTICE b/NOTICE
index 2ee5fdc..8024af7 100644
--- a/NOTICE
+++ b/NOTICE
@@ -4,3 +4,4 @@
 This product includes software developed at The Apache Software
 Foundation (http://www.apache.org/).
 
+This product uses RocksDB which carries Facebook BSD+patents license.