* configure.in: Fix the check for basename declaration. Add check

	* configure.in: Fix the check for basename declaration. Add check
	for declarations of ftello, ftello64, fseeko, fseeko64.
	* configure: Regenerate.
	* config.in: Ditto.
	* sysdep.h: If needed, declare ftello, ftello64, fseeko, fseeko64.