Work around MSVC bug, and make it less likely to happen again. Ew.

MSVC insisted on using a copy assignment where a move was intended and
ought to be used.  This would have been caught, because the class in
question inherits from NonCopyable, which declares a move assignment
operator, which is supposed to delete the implicitly declared copy
assignment operator, but of course MSVC didn't do that either, causing a
class that should have been safe to be unsafe.

Source/Core/Common/Src/FileUtil.cpp

@@ -853,7 +853,7 @@ IOFile::IOFile(IOFile&& other)
 
 IOFile& IOFile::operator=(IOFile&& other)
 {
-	IOFile((IOFile&&)other).Swap(*this);
+	Swap(other);
 	return *this;
 }