Don't link cc1 etc. against libcody.a

Don't link cc1 etc. against libcody.a

Richi complained on IRC that cc1 is linked against libcody.a.
From my understanding, it is just the cc1plus and cc1objplus binaries
that need it, so this patch links only those against it.

> this is already part of my Solaris libcody patch

The following updated patch are the incremental changes between what Rainer
has committed and what I've posted.

2021-01-05  Jakub Jelinek  <jakub@redhat.com>

gcc/cp/
	* Make-lang.in (cc1plus-checksum, cc1plus$(exeext): Add
	$(CODYLIB) after $(BACKEND).
gcc/objcp/
	* Make-lang.in (cc1objplus-checksum, cc1objplus$(exeext): Add
	$(CODYLIB) after $(BACKEND).