RocksDB Release 5.4 : Update HISTORY.md and build version.

Summary: Closes https://github.com/facebook/rocksdb/pull/2142

Reviewed By: siying

Differential Revision: D4874696

Pulled By: sagar0

fbshipit-source-id: 03e6e21735bb74e5a37cc913aabb2c250af558cc

HISTORY.md

 # Rocksdb Change Log
 ## Unreleased
+
+## 5.4.0 (04/11/2017)
 ### Public API Change
 * Support dynamically change `stats_dump_period_sec` option via SetDBOptions().
 * Added ReadOptions::max_skippable_internal_keys to set a threshold to fail a request as incomplete when too many keys are being skipped when using iterators.

include/rocksdb/version.h

@@ -5,7 +5,7 @@
 #pragma once
 
 #define ROCKSDB_MAJOR 5
-#define ROCKSDB_MINOR 3
+#define ROCKSDB_MINOR 4
 #define ROCKSDB_PATCH 0
 
 // Do not use these. We made the mistake of declaring macros starting with