sdjournal: close dlopen handle on error in New* functions
sdjournal: close dlopen handle on error in New* functions

We don't want to leak it.

coreos/go-systemd,coreos/go-systemd,glerchundi/go-systemd,jonboulle/go-systemd,endocode/go-systemd,endocode/go-systemd,glerchundi/go-systemd,brnv/go-systemd,jonboulle/go-systemd,brnv/go-systemd