[llvm] 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.

llvm-svn: 369013
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
index e3ace26..8de3f7e 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
@@ -242,19 +242,19 @@
                              JITSymbolResolver &Resolver) {
   switch (Arch) {
   default:
-    return make_unique<RuntimeDyldELF>(MemMgr, Resolver);
+    return std::make_unique<RuntimeDyldELF>(MemMgr, Resolver);
   case Triple::mips:
   case Triple::mipsel:
   case Triple::mips64:
   case Triple::mips64el:
-    return make_unique<RuntimeDyldELFMips>(MemMgr, Resolver);
+    return std::make_unique<RuntimeDyldELFMips>(MemMgr, Resolver);
   }
 }
 
 std::unique_ptr<RuntimeDyld::LoadedObjectInfo>
 RuntimeDyldELF::loadObject(const object::ObjectFile &O) {
   if (auto ObjSectionToIDOrErr = loadObjectImpl(O))
-    return llvm::make_unique<LoadedELFObjectInfo>(*this, *ObjSectionToIDOrErr);
+    return std::make_unique<LoadedELFObjectInfo>(*this, *ObjSectionToIDOrErr);
   else {
     HasError = true;
     raw_string_ostream ErrStream(ErrorStr);