* readelf.c (ia64_process_unwind): Turn into a void funtion.

	* readelf.c (ia64_process_unwind): Turn into a void funtion.
	(hppa_process_unwind): Likewise.
	(arm_process_unwind): Likewise.
	(process_unwind): Likewise.
	(arm_get_section_word): Rename to get_unwind_section_word.
	Add sym_name parameter to return the offset into the string table
	of the symbol associated with the reloc applied to the word.
	(decode_tic6x_unwind_regmask): Add NULL argument to invocation of
	get_unwind_section_word.
	(dump_arm_unwind): Likewise.
	(decode_arm_unwind_bytecode): Prepend a comma when *not* the first
	register in a list.
	(decode_arm_unwind): If the returned function address is 0 and a
	valid symname offset is provided use that to compute the name
	associated with the entry.
	Add extra checks of the compact model index entry.