Define a CI run withing a specified docker image that uses pre-defined
  versions of mesa, libdrm, and VK-GL_CTS.

  The gitlab CI file .gitlab-ci.yml has been placed under ci/ in order to
  avoid enabling the Ci automatically.

  If the host provides a render device /dev/dri/render128D then forward
  this device, use it as host device and run the dEQP GLES 2, 3, and 3.1
  test suites as well as piglit by using vtest, a GL and a GLES
  host context.

  If this device is not available use the llvmpipe driver as host device
  and run only dQEP GLES 2 with the GL and GLES host contexts.

  The initial work for getting the CI running on normal hardware drivers
  has been done by
    Tomeu Vizoso <tomeu.vizoso@collabora.com> and
    Jakob Bornecrantz <jakob@collabora.com>

  Getting it to work with the llvmpipe host context was done by
    Gert Wollny <gert.wollny@collabora.com>

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>