Akash Rawal authored Jun 06, 2017 and Tim Rühsen committed Jun 06, 2017

* .gitlab-ci.yml: Separate sanitizer build from `make distcheck` and
                  use clang++ as c++ compiler in clang/Fedora build
* .travis.sh: Use clang++ as c++ compiler if CC=clang and
              disable sanitizer builds (unstable on Travis-CI)
* .travis.yml: Add lzip package
* .travis_setup.sh: Likewise