Re: bfd_cleanup for object_p

I hate files that you can't compile.

	* cisco-core.c (cisco_core_file_p): Return bfd_cleanup.
	* hpux-core.c (hpux_core_core_file_p): Update prototype.
	* sco5-core.c (sco5_core_file_p): Return bfd_cleanup.
	(core_sco5_vec): Correct initialisers.