flounder: Aarch32 user space PC alignment exception

arm32 does not have a PC alignment exception. Aarch32 on Denver
processor, however, can produce a PC alignment exception. Add
handler so that we produce a user space signal instead of a
kernel panic.

Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 24817444
Change-Id: Ib93e6369e6312dd5fddc7b7fbe39b3c7b9a616fc
1 file changed