Ruby

Expand Qnone and Qnull macros

In the past, Qnone and Qnull had different values
in ripper context like below.
However 89cfc152071 removes the usage in ripper context,
then expand the macro.

#ifndef RIPPER
# define Qnone 0
# define Qnull 0
#else
# define Qnone Qnil
# define Qnull Qundef
#endif