Revert "Remove redundant "std::move"s in return statements"

The build failed with

  error: call to deleted constructor of 'llvm::Error'

errors.

This reverts commit 1c2241a7936bf85aa68aef94bd40c3ba77d8ddf2.
diff --git a/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp b/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp
index eeb0a4e..89eef57 100644
--- a/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp
+++ b/llvm/lib/ExecutionEngine/JITLink/MachOLinkGraphBuilder.cpp
@@ -28,19 +28,19 @@
     return make_error<JITLinkError>("Object is not a relocatable MachO");
 
   if (auto Err = createNormalizedSections())
-    return Err;
+    return std::move(Err);
 
   if (auto Err = createNormalizedSymbols())
-    return Err;
+    return std::move(Err);
 
   if (auto Err = graphifyRegularSymbols())
-    return Err;
+    return std::move(Err);
 
   if (auto Err = graphifySectionsWithCustomParsers())
-    return Err;
+    return std::move(Err);
 
   if (auto Err = addRelocations())
-    return Err;
+    return std::move(Err);
 
   return std::move(G);
 }