* rs6000-core.c (make_bfd_asection): New function to add a section

	* rs6000-core.c (make_bfd_asection):  New function to add a section
	to the core file bfd.
	(rs6000coff_core_p):  Use make_bfd_asection to add the core file
	sections.
	Use BFD routines to seek, read and stat the core file.
	Handle .data sections from loaded objects and anonymously mmapped
	regions, these are available in AIX 4 core files.