Docker ARMv7 build not working due to dockcross problem

[larroy]

ARMv7 builds using docker is broken due to:

dockcross/dockcross#257

Working on a fix.

[lupesko]

Thanks for reporting @larroy !
@mxnet-label-bot [ARM, Build]

[lupesko]

@larroy I see in Jenkins ARMv7 build is passing?
http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/incubator-mxnet/detail/master/1545/pipeline

[lebeg]

The problem I think is in the run and test step on qemu, not in the compile. But for now we don't have a CI testing stage for that platform.

[larroy]

it builds but it fails at runtime.

[larroy]

This can be closed.