Fortran: Fix non_overridable typebound proc problems [PR84674/117730].

Fortran: Fix non_overridable typebound proc problems [PR84674/117730].

2024-11-24  Paul Thomas  <pault@gcc.gnu.org>

gcc/fortran/ChangeLog

	PR fortran/117730
	* class.cc (add_proc_comp): Only reject a non_overridable if it
	has no overridden procedure and the component is already
	present in the vtype.
	PR fortran/84674
	* resolve.cc (resolve_fl_derived): Do not build a vtable for a
	derived type extension that is completely empty.

gcc/testsuite/ChangeLog

	PR fortran/117730
	* gfortran.dg/pr117730_a.f90: New test.
	* gfortran.dg/pr117730_b.f90: New test.

	PR fortran/84674
	* gfortran.dg/pr84674.f90: New test.