[Timers] TimerGroup::printJSONValues(): print mem timer with .mem suffix

Summary: We have just used `.sys` suffix for the previous timer, this is clearly a typo

Reviewers: george.karpenkov, NoQ, alexfh, sbenza

Reviewed By: alexfh

Subscribers: llvm-commits, cfe-commits

Differential Revision: https://reviews.llvm.org/D46936

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332503 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/Timer.cpp

@@ -387,7 +387,7 @@ const char *TimerGroup::printJSONValues(raw_ostream &OS, const char *delim) {
     printJSONValue(OS, R, ".sys", T.getSystemTime());
     if (T.getMemUsed()) {
       OS << delim;
-      printJSONValue(OS, R, ".sys", T.getMemUsed());
+      printJSONValue(OS, R, ".mem", T.getMemUsed());
     }
   }
   TimersToPrint.clear();