Implement svn_ra_get_location_segments and svn_ra_stat in JavaHL.

[in subversion/bindings/javahl/src/org/apache/subversion/javahl]
* ISVNRemote.java (ISVNRemote.stat, ISVNRemote.LocationSegment,
  ISVNRemote.getLocationSegments): New.
* remote/RemoteSession.java (ISVNRemote.stat, ISVNRemote.LocationSegment): New.

[in subversion/bindings/javahl/native]
* RemoteSession.h
  (RemoteSession::stat, RemoteSession::getLocationSegments): New methods.
* RemoteSession.cpp
  (RemoteSession::stat, RemoteSession::getLocationSegments): Implement.
  (LocationSegmentHandler): New helper for RemoteSession::getLocationSegments.

* org_apache_subversion_javahl_remote_RemoteSession.cpp
  (Java_org_apache_subversion_javahl_remote_RemoteSession_stat,
   Java_org_apache_subversion_javahl_remote_RemoteSession_getLocationSegments):
   New native wrappers.

[in subversion/bindings/javahl/tests/org/apache/subversion/javahl]
* SVNRemoteTests.java
  (SVNRemoteTests.testStat, SVNRemoteTests.testGetLocationSegments): New.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1509055 13f79535-47bb-0310-9956-ffa450edef68