CodeGen: Fixup for r280128, since GCC isn't as permissive as Clang

Fixes the bots, e.g.:
http://lab.llvm.org:8011/builders/lldb-x86_64-ubuntu-14.04-buildserver/builds/10055

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280135 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed