Cover cs0,1 register corruption in the signal_context test case.
lc0, sa0 registers previously omitted from the clobbers list
are now captured.
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Brian Cain <brian.cain@oss.qualcomm.com>