7017124: Fix some VM stats to avoid 32-bit overflow

Added new method inc_stat_counter() to increment long statistic values and use atomic long load and store.

Reviewed-by: dholmes, jrose, phh, never

hotspot/src/share/vm/runtime/java.cpp

@@ -320,7 +320,7 @@ void print_statistics() {
   }
 
   print_bytecode_count();
-  if (WizardMode) {
+  if (PrintMallocStatistics) {
     tty->print("allocation stats: ");
     alloc_stats.print();
     tty->cr();