The hardcoded architecture list was little-endian only, causing
seccomp_arch_add() to fail with -EDOM on s390x.
Drop it. It's optional and libseccomp automatically adds the native
architecture when the filter is created.
Fixes: https://github.com/opencontainers/runc/issues/4835
Signed-off-by: Ricardo Branco <rbranco@suse.de>