Begin using gitlab for building to save time on auto code tests.

Code tests are still run on Travis CI, but distro-specific builds are run on GitLab CI.
Currently these are used:
1. Debian stable
2. Ubuntu latest
3. CentOS latest
4. Fedora latest
5. Alpine

Debian and CentOS are for testing builds on older systems, for *.deb vs *.rpm, respectively.
Ubuntu and Fedora are for testing builds on the latest **stable** systems for *.deb and *.rpm.
Alpine is used to test building/installing from source.

All run concurrently.

In the future may expand tests on Gitlab to cover code testing as well.

.gitlab-ci.yml

@@ -0,0 +1,41 @@
+# Basic notes: builds firejail on 5 different systems for 2 package systems:
+# 1. Debian-based systems. Use debian:jessie to ensure reasonable backwards
+# compat and ubuntu:latest for new setups
+# 2. Redhat-based systems. Use centos:latest for reasonable backwards compat
+# and fedora:latest for new setups
+# 3. Alpine for installing directly from source
+build_ubuntu_package:
+    image: ubuntu:latest
+    script:
+    - apt-get update -qq
+    - apt-get install -y -qq build-essential lintian
+    - ./configure --prefix=/usr && make deb && dpkg -i firejail*.deb
+
+build_debian_package:
+  image: debian:jessie
+  script:
+    - apt-get update -qq
+    - apt-get install -y -qq build-essential lintian
+    - ./configure --prefix=/usr && make deb && dpkg -i firejail*.deb
+
+build_redhat_package:
+    image: centos:latest
+    script:
+        - yum update -y
+        - yum install -y rpm-build gcc make
+        - ./configure --prefix=/usr && make rpms && yum install -y firejail*.rpm
+
+build_fedora_package:
+    image: fedora:latest
+    script:
+        - dnf update -y
+        - dnf install -y rpm-build gcc make
+        - ./configure --prefix=/usr && make rpms && rpm -i firejail*.rpm
+
+build_src_package:
+    image: alpine:latest
+    script:
+        - apk update
+        - apk upgrade
+        - apk add build-base linux-headers
+        - ./configure --prefix=/usr && make && make install-strip

.travis.yml

@@ -4,10 +4,6 @@ sudo: true
 
 script:
   - sudo apt-get -y install expect csh xzdec lintian fakeroot
-  # Build Debian package
-  - ( ./configure --prefix=/usr && make deb && sudo dpkg -i firejail*.deb )
-  # Remove Debian package
-  - ( sudo dpkg -P firejail )
   - ( ./configure --prefix=/usr && make && sudo make install && make test-travis )
   - ( sudo make install-strip DESTDIR=$(readlink -f appdir) )
   # If successful, build release tarball

README.md

@@ -1,5 +1,6 @@
 # Firejail
-[![Build Status](https://travis-ci.org/netblue30/firejail.svg?branch=master)](https://travis-ci.org/netblue30/firejail)
+[![Test Status](https://travis-ci.org/netblue30/firejail.svg?branch=master)](https://travis-ci.org/netblue30/firejail)
+[![Build Status](https://gitlab.com/Firejail/firejail_ci/badges/master/pipeline.svg)](https://gitlab.com/Firejail/firejail_ci)
 
 Firejail is a SUID sandbox program that reduces the risk of security breaches by restricting
 the running environment of untrusted applications using Linux namespaces, seccomp-bpf