[Development] Update QtWayland CI to Wayland 1.6+

[Rutledge Shawn]

> On 14 Jan 2016, at 16:05, Jędrzej Nowacki <jedrzej.nowacki at theqtcompany.com> wrote:
> 
> On Thursday 14 of January 2016 06:39:29 Thiago Macieira wrote:
>> On Thursday 14 January 2016 10:15:40 Jędrzej Nowacki wrote:
>>> I guess the whole point of having Ubuntu 14.04 LTS in CI is to support
>>> that
>>> 
>>> platform as long as it is important. As you said it will be important
>>> until
>>> 16.04 release. I think we could potentially remove 14.04 from CI on dev
>>> branch after Qt 5.7 release. Can't you "ifdef" you code, so it "works"
>>> with
>>> the older Wayland too?
>> 
>> I don't think it makes sense to support Wayland that old, especially not on
>> a distro that decided to not support Wayland. It's probably better to just
>> skip building Wayland altogether if the found libraries are too old.
>> 
>> We just need a newer distro that does support Wayland to be present.
> 
> True, so the assumption is that Qt should compile on the 14.04 for now. It 
> doesn't mean that the provided Wayland will be used. I'm fine with that :-)

But the one that we ship with the Qt installer had better work, right?  It’s built on some version of RedHat AFAIK.