[RocksJava] GetUpdatesSince support

Summary:
This differential describes further changes to the Java-API

New methods:

* GetUpdatesSince
* GetLatestSequenceNumber
* EnableFileDeletions
* DisableFileDeletions

This pull requests depends on: https://github.com/facebook/rocksdb/pull/472

Test Plan:
make rocksdbjava
make jtest
mvn -f rocksjni.pom package

Reviewers: yhchiang, adamretter, ankgup87

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D32151

java/rocksjni/transaction_log.cc

@@ -6,9 +6,9 @@
 // This file implements the "bridge" between Java and C++ and enables
 // calling c++ rocksdb::Iterator methods from Java side.
 
+#include <jni.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <jni.h>
 
 #include "include/org_rocksdb_TransactionLogIterator.h"
 #include "rocksdb/transaction_log.h"