main: recursively cleanup tmpdir in info_start()
main: recursively cleanup tmpdir in info_start()

By using g_rmdir() the temp directory remains existing, because it is
not empty and g_rdmir() does not perform recursive deletion. Use
rm_tree() here instead.

Signed-off-by: Enrico Jorns <a2e5f936c390f36494e46e71bcfbe365bb1e8c49@pengutronix.de>

ejoerns/rauc,jluebbe/rauc,rauc/rauc,ejoerns/rauc,jluebbe/rauc,rauc/rauc,ejoerns/rauc,rauc/rauc,jluebbe/rauc