This test was using a config that was invalid in two ways and assuming that a particular one of them was the one that was going to be reported.
This test was using a config that was invalid in two ways and assuming that a
particular one of them was the one that was going to be reported.

For whatever reason, the other one is reported when running with gccgo, so fix
one of the errors in the config.

ericsnowcurrently/juju-charm,rogpeppe/charm,ericsnowcurrently/juju-charm,ericsnowcurrently/juju-charm,makyo/charm,wwitzel3/charm,makyo/charm,wwitzel3/juju-charm,wwitzel3/juju-charm,wwitzel3/juju-charm,makyo/charm,wwitzel3/charm,wwitzel3/charm