Suppress valgrind issue with rocksdb CacheEntryStats

Summary: RocksDB is using STATIC_AVOID_DESTRUCTION with global objects that skips destructor so these global objects are not properly destructed. The code work around ASAN by forcing the destruction but not for valgrind. Going forward STATIC_AVOID_DESTRUCTION should be made valgrind-aware. Suppress these errors for now since they are one-time global only.

Reviewed By: luqun

Differential Revision: D29257815

fbshipit-source-id: 100c77ed582

mysql-test/valgrind.supp

@@ -2847,3 +2847,21 @@
    fun:_Z41__static_initialization_and_destruction_0ii
    ...
 }
+
+{
+   Still reachable for once-per-process initializations
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN10my_rocksdb24RegisterCacheDeleterRoleEPFvRKNS_5SliceEPvENS_14CacheEntryRoleE
+   ...
+}
+
+{
+   Still reachable for once-per-process initializations
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN10my_rocksdb24CacheEntryStatsCollectorINS_13InternalStats19CacheEntryRoleStatsEE9GetSharedEPNS_5CacheEPNS_11SystemClockEPSt10shared_ptrIS3_E
+   ...
+}