arm64: add seccomp syscall for compat task
arm64: add seccomp syscall for compat task

This patch allows compat task to issue seccomp() system call.

Reviewed-by: Kees Cook <50cb10d2be062154b17ab4d66a4eab34f1cf1c84@chromium.org>
Signed-off-by: AKASHI Takahiro <be00867a1b2ca7b25ce4b2b4a9efd7cdbb9c164b@linaro.org>
Signed-off-by: Will Deacon <b913f13ef92ac157955c954ccaaff7be065faba4@arm.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs