Fix auxv data parsing on 64-bit solaris

    Fix auxv data parsing on 64-bit solaris
	* target.h (struct target_ops): New field to_auxv_parse.
	* auxv.c (default_auxv_parse): New, renamed from previous
	target_auxv_parse.
	(target_auxv_parse): Try to call target method.  Fallback to
	default_auxv_parse if not found.
	* procfs.c (procfs_auxv_parse): New.
	(init_procfs_ops): On Solaris, in 64-bit mode, install
	procfs_auxv_parse.