Rename 1.2.x-r16050 branch to 1.2.x-r15943,r15967,r16050, so as to more
accurately reflect the revisions which were merged.



git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.2.x-r15943,r15967,r16050@856131 13f79535-47bb-0310-9956-ffa450edef68