[unittests] Do not use llvm::sort in googlemock

Summary:
This reverts r329475 which applied to googlemock. This change makes the
googlemock implementation in LLVM dependent on LLVM unnecessarily.

Reviewers: echristo, mgrang

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D52287

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@342612 91177308-0d34-0410-b5e6-96231b3b80d8

utils/unittest/googlemock/include/gmock/gmock-matchers.h

@@ -2654,7 +2654,7 @@ class WhenSortedByMatcher {
       LhsStlContainerReference lhs_stl_container = LhsView::ConstReference(lhs);
       ::std::vector<LhsValue> sorted_container(lhs_stl_container.begin(),
                                                lhs_stl_container.end());
-      ::llvm::sort(
+      ::std::sort(
            sorted_container.begin(), sorted_container.end(), comparator_);
 
       if (!listener->IsInterested()) {