Fix CodeGenCXX/debug-info.cpp test on Windows

On Windows, it looks like FlagIndirectVariable is being set in Flags for
DIBuilder::createLocalVariable(), giving us an i32 of 8192 instead of 0,
as on Linux.

Fixes breakage from r184367.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184438 91177308-0d34-0410-b5e6-96231b3b80d8