Fix the last remaining deprecation warning in JavaHL.

* subversion/bindings/javahl/native/deprecated.cpp: New file.
  (SVNClient::mergeReintegrate): Move implementation to here ...
* subversion/bindings/javahl/native/SVNClient.cpp
  (SVNClient::mergeReintegrate): ... from here.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1619067 13f79535-47bb-0310-9956-ffa450edef68