Fix for CMakeLists.txt on Windows for RocksJava

Summary: Closes https://github.com/facebook/rocksdb/pull/2730

Differential Revision: D5619256

Pulled By: ajkr

fbshipit-source-id: c80d697eeceab91964259132e58f5cd2219efb93

java/CMakeLists.txt

@@ -77,6 +77,7 @@ set(NATIVE_JAVA_CLASSES
         org.rocksdb.FlushOptions
         org.rocksdb.HashLinkedListMemTableConfig
         org.rocksdb.HashSkipListMemTableConfig
+        org.rocksdb.IngestExternalFileOptions
         org.rocksdb.Logger
         org.rocksdb.LRUCache
         org.rocksdb.MemTableConfig