Fix compilation failure in rdb_perf_context.h

Rdb_atomic_perf_counters uses my_io_perf_atomic_struct
which uses atomic_stat from include/atomic_stat.h
which was backported in the previous cset.

Author: spetrunia

storage/rocksdb/CMakeLists.txt

@@ -41,6 +41,7 @@ SET(ROCKSDB_SOURCES
   rdb_sst_info.cc rdb_sst_info.h
   rdb_utils.cc rdb_utils.h rdb_buff.h
   rdb_threads.cc rdb_threads.h
+  rdb_mariadb_port.h
   ${ROCKSDB_LIB_SOURCES}
 )
 

storage/rocksdb/rdb_mariadb_port.h

@@ -0,0 +1,16 @@
+
+#include "atomic_stat.h"
+
+/* Struct used for IO performance counters, shared among multiple threads */
+struct my_io_perf_atomic_struct {
+  atomic_stat<ulonglong> bytes;
+  atomic_stat<ulonglong> requests;
+  atomic_stat<ulonglong> svc_time; /*!< time to do read or write operation */
+  atomic_stat<ulonglong> svc_time_max;
+  atomic_stat<ulonglong> wait_time; /*!< total time in the request array */
+  atomic_stat<ulonglong> wait_time_max;
+  atomic_stat<ulonglong> slow_ios; /*!< requests that take too long */
+};
+typedef struct my_io_perf_atomic_struct my_io_perf_atomic_t;
+
+

storage/rocksdb/rdb_perf_context.h

@@ -25,6 +25,8 @@
 #include "./handler.h"
 #include <my_global.h>
 
+#include "rdb_mariadb_port.h"
+
 namespace myrocks {
 
 enum {