[Skiboot] [PATCH] travis: allow failures of fedora24

[Stewart Smith]

Stewart Smith <stewart at linux.vnet.ibm.com> writes:
> Because Fedora repositories are unreliable and we often get:
>   Error: Failed to synchronize cache for repo 'updates'
>
> :(
>
> Signed-off-by: Stewart Smith <stewart at linux.vnet.ibm.com>

And I merged this one in too, because otherwise travis failures make me grumpy.

-- 
Stewart Smith
OPAL Architect, IBM.