Add Solaris BCP (the part of Solaris which allows it to run

	Add Solaris BCP (the part of Solaris which allows it to run
	SunOS4 a.out files) core file handling.
	* aoutf1.h (external_solaris_bcp_core, swapcore_solaris_bcp):
	New structure and its swap in function.
	(internal_sunos_core):  New member c_data_addr, to receive the
	start address of the data section in the core file.
	(swapcore_sun3, swapcore_sparc, sunos4_core_file_p):  Use it.
	(sunos4_core_file_p):  Recognize Solaris BCP core file.
	(sunos4_core_file_matches_executable_p):  Always indicate match
	for Solaris BCP core files.