[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/tools/llvm-readobj/COFFDumper.cpp b/llvm/tools/llvm-readobj/COFFDumper.cpp
index c7ccbe9..4c37d26 100644
--- a/llvm/tools/llvm-readobj/COFFDumper.cpp
+++ b/llvm/tools/llvm-readobj/COFFDumper.cpp
@@ -1153,7 +1153,7 @@
                                                 StringRef SectionContents) {
   ArrayRef<uint8_t> BinaryData(Subsection.bytes_begin(),
                                Subsection.bytes_end());
-  auto CODD = llvm::make_unique<COFFObjectDumpDelegate>(*this, Section, Obj,
+  auto CODD = std::make_unique<COFFObjectDumpDelegate>(*this, Section, Obj,
                                                         SectionContents);
   CVSymbolDumper CVSD(W, Types, CodeViewContainer::ObjectFile, std::move(CODD),
                       CompilationCPUType, opts::CodeViewSubsectionBytes);