Fortran: Generate new charlens for shared symbol typespecs [PR89462]

2024-04-25  Paul Thomas  <pault@gcc.gnu.org>
	    Jakub Jelinek  <jakub@gcc.gnu.org>

gcc/fortran
	PR fortran/89462
	* decl.cc (build_sym): Add an extra argument 'elem'. If 'elem'
	is greater than 1, gfc_new_charlen is called to generate a new
	charlen, registered in the symbol namespace.
	(variable_decl, enumerator_decl): Set the new argument in the
	calls to build_sym.

gcc/testsuite/
	PR fortran/89462
	* gfortran.dg/pr89462.f90: New test.