[Piglit] [PATCH] travis: reflect new best-practice travis-ci configuration

[Andres Gomez]

This is:

Reviewed-by: Andres Gomez <agomez at igalia.com>

On Sun, 2018-12-02 at 11:28 -0500, Rhys Kidd wrote:
> Travis-CI has or will shortly make in early December 2018 a number of beneficial
> changes to their Linux continuous integration testing infrastructure [0][1].
> An accompanying benefit of this change is that Ubuntu Xenial (16.04 LTS) is now
> supported.
> 
> The benefits for piglit are primarily:
> * Testing against a more modern, supported Ubuntu Xenial (16.04 LTS). [2]
> * Removal of a corner-case for Python 3.7, makes testing more consistent.
> * Modest speed improvements from Travis-CI move to Linux infrastructure combined
>   into one (virtualized), from two previously (virtualized and container-based).
> 
> [0] https://blog.travis-ci.com/2018-10-04-combining-linux-infrastructures
> [1] https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration
> [2] https://docs.travis-ci.com/user/reference/xenial/
> 
> Signed-off-by: Rhys Kidd <rhyskidd at gmail.com>
> ---
>  .travis.yml | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/.travis.yml b/.travis.yml
> index 45b23f009..3043cd4ca 100644
> --- a/.travis.yml
> +++ b/.travis.yml
> @@ -1,6 +1,10 @@
> -sudo: false
> -os: linux
>  language: python
> +
> +os: linux
> +
> +# Use Ubuntu Xenial (16.04 LTS) environment.
> +dist: xenial
> +
>  cache:
>    - ccache
>    - pip
> @@ -23,7 +27,6 @@ matrix:
>        env: TOX_ENV="py36-{generator,noaccel,accel-nix,streams}"
>      - python: 3.7
>        env: TOX_ENV="py37-{generator,noaccel,accel-nix,streams}"
> -      dist: xenial    # required for Python 3.7 (travis-ci/travis-ci#9069)
>      - env: BUILD=cmake
>  
>  install:
-- 
Br,

Andres