Use copy initialization.

We can do it since getMemBuffer returns a unique_ptr.

llvm-svn: 260576
diff --git a/llvm/lib/Object/IRObjectFile.cpp b/llvm/lib/Object/IRObjectFile.cpp
index 9602d4d..8b84648 100644
--- a/llvm/lib/Object/IRObjectFile.cpp
+++ b/llvm/lib/Object/IRObjectFile.cpp
@@ -305,8 +305,8 @@
   if (!BCOrErr)
     return BCOrErr.getError();
 
-  std::unique_ptr<MemoryBuffer> Buff(
-      MemoryBuffer::getMemBuffer(BCOrErr.get(), false));
+  std::unique_ptr<MemoryBuffer> Buff =
+      MemoryBuffer::getMemBuffer(BCOrErr.get(), false);
 
   ErrorOr<std::unique_ptr<Module>> MOrErr =
       getLazyBitcodeModule(std::move(Buff), Context,