RFA:fix PR middle-end/23467

[Paolo Bonzini]

> on i686 native I did a make bootstrap / make compare / make check-gcc 
> from the toplevel of a unified tree.
> make check is not really suitable because it tests to many components of 
> bfd / binutils / gdb etc. so that it
> would take too much time and disk space.  I'll try an additional make 
> check-target-libjava .

Java is not tested *at all* by check-gcc, indeed, but

   make -k check-gcc check-target

will test everything that's necessary.

Paolo