Fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185120 91177308-0d34-0410-b5e6-96231b3b80d8
Fix using arg_end() - arg_begin() instead of arg_size()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185121 91177308-0d34-0410-b5e6-96231b3b80d8