Fix some warnings.

llvm-svn: 341508
diff --git a/llvm/lib/Testing/Support/SupportHelpers.cpp b/llvm/lib/Testing/Support/SupportHelpers.cpp
index ce64d6e..c0f4f44 100644
--- a/llvm/lib/Testing/Support/SupportHelpers.cpp
+++ b/llvm/lib/Testing/Support/SupportHelpers.cpp
@@ -32,5 +32,5 @@
   Result.append((*File)->getBuffer().trim());
   llvm::sys::path::append(Result, "Inputs");
   llvm::sys::path::native(Result);
-  return std::move(Result);
+  return Result;
 }