Bump version and update history

HISTORY.md

 # Rocksdb Change Log
+### 5.15.10 (9/13/2018)
+### Bug Fixes
+* Fix RocksDB Java build and tests.
+
 ### 5.15.9 (9/4/2018)
 ### Bug Fixes
 * Fix compilation errors on OS X clang due to '-Wsuggest-override'.

include/rocksdb/version.h

@@ -6,7 +6,7 @@
 
 #define ROCKSDB_MAJOR 5
 #define ROCKSDB_MINOR 15
-#define ROCKSDB_PATCH 9
+#define ROCKSDB_PATCH 10
 
 // Do not use these. We made the mistake of declaring macros starting with
 // double underscore. Now we have to live with our choice. We'll deprecate these