Add architecture support to debian-dev-build.sh
Add architecture support to debian-dev-build.sh

Although python packages are architecture-independent,
the code needs to depend on packages which are only
available on some architectures. Supply the architecture
after the package name to build a binary for the
requested architecture. Unrecognised architecture
names will give an error.

Change-Id: Ifae251dceafb5fb547249f59bb804ba8e9be96cb

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server