MDEV-20315: MyRocks tests produce valgrind failures

- Include the valgrind suppressions from the FB upstream

- Use HAVE_Valgrind, not HAVE_Purify (like the rest of MariaDB code does)
  The call to DisownData() is now actually disabled under Valgrind

mysql-test/valgrind.supp

@@ -1833,3 +1833,96 @@
    ...
    fun:s3_deinit_library
 }
+
+##
+## The following is a copy of facebook/mysql-5.6 suppressions:
+##
+
+#
+# RocksDB Storage Engine suppressions start
+#
+
+{
+   Still reachable for once-per-process initializations
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN7rocksdb16ThreadStatusUtil19NewColumnFamilyInfoEPKNS_2DBEPKNS_16ColumnFamilyDataERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPKNS_3EnvE
+   fun:_ZNK7rocksdb6DBImpl21NewThreadStatusCfInfoEPNS_16ColumnFamilyDataE
+   fun:_ZN7rocksdb2DB4OpenERKNS_9DBOptionsERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKSt6vectorINS_22ColumnFamilyDescriptorESaISD_EEPSC_IPNS_18ColumnFamilyHandleESaISJ_EEPPS0_
+   fun:_ZN7rocksdb13TransactionDB4OpenERKNS_9DBOptionsERKNS_20TransactionDBOptionsERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKSt6vectorINS_22ColumnFamilyDescriptorESaISG_EEPSF_IPNS_18ColumnFamilyHandleESaISM_EEPPS0_
+   fun:_ZN7myrocksL17rocksdb_init_funcEPv
+}
+
+
+{
+   Still reachable for once-per-process initializations
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN7rocksdb19ThreadStatusUpdater14RegisterThreadENS_12ThreadStatus10ThreadTypeEm
+   fun:_ZN7rocksdb16ThreadStatusUtil14RegisterThreadEPKNS_3EnvENS_12ThreadStatus10ThreadTypeE
+   fun:_ZN7rocksdb14ThreadPoolImpl4Impl15BGThreadWrapperEPv
+   fun:_ZNSt12_Bind_simpleIFPFPvS0_EPN7rocksdb16BGThreadMetadataEEE9_M_invokeIILm0EEEES0_St12_Index_tupleIIXspT_EEE
+   ...
+}
+
+{
+   Still reachable for once-per-process initializations
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN7rocksdb14ThreadLocalPtr14InitSingletonsEv
+   fun:_ZN7rocksdb3Env7DefaultEv
+   fun:_ZN7rocksdb9DBOptionsC1Ev
+   ...
+   fun:_ZN7myrocksL27rdb_init_rocksdb_db_optionsEv
+}
+
+{
+   Still reachable for once-per-process initializations
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN7rocksdb12_GLOBAL__N_18PosixEnv*
+   fun:_ZN7rocksdb3Env7DefaultEv
+   fun:_ZN7rocksdb9DBOptionsC1Ev
+   ...
+   fun:_ZN7myrocksL27rdb_init_rocksdb_db_optionsEv
+}
+
+{
+   Still reachable for thread local storage initialization (SetHandle)
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZNSt13unordered_mapIjPFvPvESt4hashIjESt8equal_toIjESaISt4pairIKjS2_EEEixERS8_
+   fun:_ZN7rocksdb14ThreadLocalPtr10StaticMeta10SetHandlerEjPFvPvE
+   fun:_ZN7rocksdb14ThreadLocalPtrC1EPFvPvE
+   ...
+}
+
+{
+   Still reachable for thread local storage initialization (ReclaimId)
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_ZN7rocksdb10autovectorIjLm8EE9push_backERKj
+   fun:_ZN7rocksdb14ThreadLocalPtr10StaticMeta9ReclaimIdEj
+   fun:_ZN7rocksdb14ThreadLocalPtrD1Ev
+   ...
+}
+
+{
+   Static initialization
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:_Z41__static_initialization_and_destruction_0ii
+   ...
+}
+
+##
+## RocksDB Storage Engine suppressions end
+##
+

storage/rocksdb/ha_rocksdb.cc

@@ -5386,11 +5386,11 @@ static int rocksdb_done_func(void *const p) {
 // Disown the cache data since we're shutting down.
 // This results in memory leaks but it improved the shutdown time.
 // Don't disown when running under valgrind
-#ifndef HAVE_purify
+#ifndef HAVE_valgrind
   if (rocksdb_tbl_options->block_cache) {
     rocksdb_tbl_options->block_cache->DisownData();
   }
-#endif /* HAVE_purify */
+#endif /* HAVE_valgrind */
 
   /*
     MariaDB: don't clear rocksdb_db_options and rocksdb_tbl_options.