HIVE-5087 : Rename npath UDF to matchpath (Edward Capriolo and Carl Steinbach via Ashutosh Chauhan)

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1529577 13f79535-47bb-0310-9956-ffa450edef68
Updating RELEASE_NOTES.txt for 0.12 release

git-svn-id: https://svn.apache.org/repos/asf/hive/branches/branch-0.12@1529726 13f79535-47bb-0310-9956-ffa450edef68