gitlab CI: add a basic build test

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
6 jobs for CI in 2 minutes and 46 seconds (queued for 3 seconds)
latest
Name Stage Failure
failed
build Build
      |          ^~~~~~~
compilation terminated.
make[2]: *** [Makefile:498: newport_accel.lo] Error 1
make[2]: Leaving directory '/builds/alanc/xf86-video-newport/_builddir/src'
make[1]: Leaving directory '/builds/alanc/xf86-video-newport/_builddir'
make[1]: *** [Makefile:441: all-recursive] Error 1
make: *** [Makefile:373: all] Error 2
Cleaning up file based variables
ERROR: Job failed: exit code 1