[WebAssembly] 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: sunfish, RKSimon

Reviewed By: sunfish

Subscribers: jfb, dschuff, sbc100, jgravelle-google, aheejin, llvm-commits

Differential Revision: https://reviews.llvm.org/D44873

llvm-svn: 329607

llvm/lib/Target/WebAssembly/WebAssemblyRegColoring.cpp

@@ -118,7 +118,7 @@ bool WebAssemblyRegColoring::runOnMachineFunction(MachineFunction &MF) {
   // registers), by weight next, and then by position.
   // TODO: Investigate more intelligent sorting heuristics. For starters, we
   // should try to coalesce adjacent live intervals before non-adjacent ones.
-  std::sort(SortedIntervals.begin(), SortedIntervals.end(),
+  llvm::sort(SortedIntervals.begin(), SortedIntervals.end(),
              [MRI](LiveInterval *LHS, LiveInterval *RHS) {
                if (MRI->isLiveIn(LHS->reg) != MRI->isLiveIn(RHS->reg))
                  return MRI->isLiveIn(LHS->reg);