[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/unittests/Linker/LinkModulesTest.cpp b/llvm/unittests/Linker/LinkModulesTest.cpp
index 832e50c..05523c5 100644
--- a/llvm/unittests/Linker/LinkModulesTest.cpp
+++ b/llvm/unittests/Linker/LinkModulesTest.cpp
@@ -277,7 +277,7 @@
   EXPECT_EQ(M3, M4->getOperand(0));
 
   // Link into destination module.
-  auto Dst = llvm::make_unique<Module>("Linked", C);
+  auto Dst = std::make_unique<Module>("Linked", C);
   ASSERT_TRUE(Dst.get());
   Ctx.setDiagnosticHandlerCallBack(expectNoDiags);
   Linker::linkModules(*Dst, std::move(Src));
@@ -346,7 +346,7 @@
   ASSERT_TRUE(Bar->getFunction("llvm.memset.p0s_struct.rtx_def.0s.i32"));
 
   // Link two modules together.
-  auto Dst = llvm::make_unique<Module>("Linked", C);
+  auto Dst = std::make_unique<Module>("Linked", C);
   ASSERT_TRUE(Dst.get());
   Ctx.setDiagnosticHandlerCallBack(expectNoDiags);
   bool Failed = Linker::linkModules(*Foo, std::move(Bar));