[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/DebugInfo/MSF/MappedBlockStream.cpp b/llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp
index df92577..5dc9c86 100644
--- a/llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp
+++ b/llvm/lib/DebugInfo/MSF/MappedBlockStream.cpp
@@ -52,7 +52,7 @@
 std::unique_ptr<MappedBlockStream> MappedBlockStream::createStream(
     uint32_t BlockSize, const MSFStreamLayout &Layout, BinaryStreamRef MsfData,
     BumpPtrAllocator &Allocator) {
-  return llvm::make_unique<MappedBlockStreamImpl<MappedBlockStream>>(
+  return std::make_unique<MappedBlockStreamImpl<MappedBlockStream>>(
       BlockSize, Layout, MsfData, Allocator);
 }
 
@@ -63,7 +63,7 @@
   MSFStreamLayout SL;
   SL.Blocks = Layout.StreamMap[StreamIndex];
   SL.Length = Layout.StreamSizes[StreamIndex];
-  return llvm::make_unique<MappedBlockStreamImpl<MappedBlockStream>>(
+  return std::make_unique<MappedBlockStreamImpl<MappedBlockStream>>(
       Layout.SB->BlockSize, SL, MsfData, Allocator);
 }
 
@@ -318,7 +318,7 @@
                                         const MSFStreamLayout &Layout,
                                         WritableBinaryStreamRef MsfData,
                                         BumpPtrAllocator &Allocator) {
-  return llvm::make_unique<MappedBlockStreamImpl<WritableMappedBlockStream>>(
+  return std::make_unique<MappedBlockStreamImpl<WritableMappedBlockStream>>(
       BlockSize, Layout, MsfData, Allocator);
 }