[U-Boot] .travis.yml: explicitly request sudo

[Tom Rini]

On Wed, Feb 03, 2016 at 10:41:34AM -0700, Stephen Warren wrote:

> From: Stephen Warren <swarren at nvidia.com>
> 
> Without this, builds default to using new Travis CI infra-structure which
> does no allow sudo. The builds need sudo in order to install the ELDK
> compilers. Consequently, almost all builds fail without this.
> 
> I suspect that existing Travis CI users have not noticed this because
> their accounts or builds have been grand-fathered into backwards-
> compatible default settings, whereas I just set up a new build from
> scratch and received new default settings.
> 
> Cc: Wolfgang Denk <wd at denx.de>
> Cc: Heiko Schocher <hs at denx.de>
> Cc: Tom Rini <trini at ti.com>
> Cc: Daniel Schwierzeck <daniel.schwierzeck at gmail.com>
> Cc: Andreas Färber <afaerber at suse.de>
> Signed-off-by: Stephen Warren <swarren at nvidia.com>
> Acked-by: Heiko Schocher <hs at denx.de>

Applied to u-boot/master, thanks!

-- 
Tom
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