[Morello] Add capability fault codes and report fault information

[Morello] Add capability fault codes and report fault information

Report capability faults with additional information, like tag, bounds,
sealed permissions and access faults.

gdb/ChangeLog

2020-10-20  Luis Machado  <luis.machado@arm.com>

	* aarch64-linux-tdep.c: Include value.h.
	(aarch64_linux_report_signal_info): New function.
	(aarch64_linux_init_abi): Register hook for reporting signal
	information.
	* arch/aarch64-cap-linux.h (SEGV_CAPTAGERR, SEGV_CAPSEALEDERR)
	(SEGV_CAPBOUNDSERR, SEGV_CAPPERMERR, SEGV_CAPSTORETAGERR): New
	constants.