[Clang] Migrate llvm::make_unique to std::make_unique

Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.

Differential revision: https://reviews.llvm.org/D66259

llvm-svn: 368942
diff --git a/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp b/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
index 1e45ee9..9571679 100644
--- a/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
+++ b/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
@@ -30,7 +30,7 @@
     ArrayRef<std::string> plugins,
     ArrayRef<std::function<void(CheckerRegistry &)>> checkerRegistrationFns,
     DiagnosticsEngine &diags) {
-  auto checkerMgr = llvm::make_unique<CheckerManager>(context, opts);
+  auto checkerMgr = std::make_unique<CheckerManager>(context, opts);
 
   CheckerRegistry allCheckers(plugins, diags, opts, context.getLangOpts(),
                               checkerRegistrationFns);