community/py3-argon2-cffi: disable on s390x

https://build.alpinelinux.org/buildlogs/build-3-11-s390x/community/py3-argon2-cffi/py3-argon2-cffi-19.2.0-r0.log

community/py3-argon2-cffi/APKBUILD

@@ -5,7 +5,7 @@ pkgver=19.2.0
 pkgrel=0
 pkgdesc="The secure Argon2 password hashing algorithm"
 url="https://argon2-cffi.readthedocs.io/en/stable/"
-arch="all"
+arch="all !s390x" # Fails to build
 license="MIT"
 depends="python3"
 makedepends="argon2-dev python3-dev py3-setuptools libffi-dev"