Fix java test buid broken by 7d87f02799

Summary: 7d87f02799 changed WriteBatch::InsertInto(). Need to change it.

Test Plan: Run it.

Reviewers: yhchiang, ngbronson

Reviewed By: ngbronson

Subscribers: leveldb, dhruba

Differential Revision: https://reviews.facebook.net/D52353

java/rocksjni/write_batch_test.cc

@@ -52,7 +52,7 @@ jbyteArray Java_org_rocksdb_WriteBatchTest_getContents(
   std::string state;
   rocksdb::ColumnFamilyMemTablesDefault cf_mems_default(mem);
   rocksdb::Status s =
-      rocksdb::WriteBatchInternal::InsertInto(b, &cf_mems_default);
+      rocksdb::WriteBatchInternal::InsertInto(b, &cf_mems_default, nullptr);
   int count = 0;
   rocksdb::Arena arena;
   rocksdb::ScopedArenaIterator iter(mem->NewIterator(