Special Build for  debugging LLVM IR

```
I propose implementing another Special Build for a gdb-able binary with no
optimizations, which produces the same LLVM IR as a non-debug build.

Having the Py_INCREF/DECREF macros produce extra basicblocks makes it hard
to pin down an error, which appeared in non-debug code.

```

Original issue reported on code.google.com by `joerg...@gmail.com` on 25 Feb 2010 at 6:28
