[Support] Change std::sort to llvm::sort in response to r327219

Summary:
r327219 added wrappers to std::sort which randomly shuffle the container before sorting.
This will help in uncovering non-determinism caused due to undefined sorting
order of objects having the same key.

To make use of that infrastructure we need to invoke llvm::sort instead of std::sort.

Note: This patch is one of a series of patches to replace *all* std::sort to llvm::sort.
Refer the comments section in D44363 for a list of all the required patches.

Reviewers: chandlerc, jordan_rose, bkramer

Reviewed By: bkramer

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45140

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329536 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/SourceMgr.cpp

@@ -270,7 +270,7 @@ SMDiagnostic::SMDiagnostic(const SourceMgr &sm, SMLoc L, StringRef FN,
   : SM(&sm), Loc(L), Filename(FN), LineNo(Line), ColumnNo(Col), Kind(Kind),
     Message(Msg), LineContents(LineStr), Ranges(Ranges.vec()),
     FixIts(Hints.begin(), Hints.end()) {
-  std::sort(FixIts.begin(), FixIts.end());
+  llvm::sort(FixIts.begin(), FixIts.end());
 }
 
 static void buildFixItLine(std::string &CaretLine, std::string &FixItLine,

lib/Support/Timer.cpp

@@ -284,7 +284,7 @@ void TimerGroup::addTimer(Timer &T) {
 
 void TimerGroup::PrintQueuedTimers(raw_ostream &OS) {
   // Sort the timers in descending order by amount of time taken.
-  std::sort(TimersToPrint.begin(), TimersToPrint.end());
+  llvm::sort(TimersToPrint.begin(), TimersToPrint.end());
 
   TimeRecord Total;
   for (const PrintRecord &Record : TimersToPrint)