Disable SIGBUS alignment check in the signal handler: sigbus_action() to avoid a new SIGBUS.
Added FreeBSD expect error for the si_code test which is just fixed by r268383.
Remove test comparing instruction and data addresses.

Developed in collaboration with:	 kib
Merge branch 'isilon-atf' of github.com:yaneurabeya/freebsd into isilon-atf