Re-add checks for AVOID and correct syscall activation.

This patch fixes commit 6e296f3a7cab6d946479e76398535f107e80ac4d, that is
it adds back checks for AVOID types of syscalls and corrects syscalls
deactivation.

Signed-off-by: Ildar Muslukhov <ildarm@google.com>
fix arch selection parameter

This patch fixes arch (-a) selection parameter when applied to all
syscall.

Signed-off-by: Ildar Muslukhov <ildarm@google.com>