[PATCH] travis: Use docker scripts

[Geoff Levand]

Hi Sam,

On 08/14/2018 08:26 PM, Samuel Mendoza-Jonas wrote:
> Update the Travis config to use Petitboot's own docker scripts, and add
> ppc64le to the list of recognised architectures.

recognized?

> + - ./docker/build-pb --check --verbose --configure-opts "--enable-platform-arm64 --enable-platform-powerpc"

The /sbin/dmidecode in configure.ac is OK for buildroot, but for the ubuntu
based docker image we'll need:
  
  --configure-opts "HOST_PROG_DMIDECODE=/usr/sbin/dmidecode --enable-platform-arm64 --enable-platform-powerpc"

-Geoff