environs/bootstrap: test failure under gccgo

lucky(~/src/launchpad.net/juju-core) % go test -compiler gccgo launchpad.net/juju-core/environs/bootstrap

----------------------------------------------------------------------
FAIL: bootstrap_test.go:321: net_juju_core_environs_bootstrap_test.TestSeriesToUpload.pN62_launchpad.net_juju_core_environs_bootstrap_test.bootstrapSuite

bootstrap_test.go:331:
    c.Assert(bootstrap.SeriesToUpload(cfg, nil), gc.DeepEquals, []string{"quantal", "precise", "lucid"})
... obtained []string = []string{"quantal", "lucid", "precise"}
... expected []string = []string{"quantal", "precise", "lucid"}

OOPS: 22 passed, 1 FAILED
--- FAIL: TestPackage (13.50 seconds)
FAIL
FAIL launchpad.net/juju-core/environs/bootstrap 13.793s

This should be using jc.SameContents.