ade install failed for me as my target device doesn't have
ribchester-bundle, however it did so without giving any indication
something was wrong at all.

Sort this out by raising an exception if the remote command returns a
non-zero exit status.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>

Differential Revision: https://phabricator.apertis.org/D5260