Merge pull request #3293 from brauner/2020-03-14/travis_enable_arches

.travis.yml

+dist: bionic
+sudo: required
 language: c
+
 compiler:
  - gcc
  - clang
+
+arch:
+ - amd64
+ - arm64
+ - ppc64le
+ - s390x
+
 before_install:
  - sudo add-apt-repository ppa:ubuntu-lxc/daily -y
  - sudo apt-get update -qq
- - sudo apt-get install -qq coccinelle parallel libapparmor-dev libcap-dev libseccomp-dev python3-dev python3-setuptools docbook2x libgnutls-dev libselinux1-dev linux-libc-dev
+ - sudo apt-get install -qq coccinelle parallel libapparmor-dev libcap-dev libseccomp-dev python3-dev python3-setuptools docbook2x libselinux1-dev linux-libc-dev
 script: src/tests/travis.sh
 notifications:
   email: