gitlab: Add meson build to CI

.gitlab-ci.yml

@@ -13,6 +13,10 @@ build:
     - make check-daemon
     - ulimit -c 0 # don't dump core files on tests that are supposed to assert
     - make distcheck
+    - cd ..
+    - meson . build-meson
+    - ninja -C build-meson
   artifacts:
     paths:
       - build/
+      - build-meson/

scripts/Dockerfile

@@ -41,6 +41,8 @@ RUN apt-get update && apt-get install -y \
     libxml-parser-perl \
     libxtst-dev \
     make \
+    meson \
+    ninja-build \
     systemd
 
 # Add a user and set as default for the build. This is safer, in general, and