testing/check_software: ignore liblibgolang for now

liblibgolang from pygolang is used in wendelin and because of a current
limitation of setuptools_dso we don't have rpath on libraries for python
extensions linked with pygolang, but at runtime we import pygolang before and
there's no issue at runtime.

suggested by Kirill on nexedi/slapos!1007 (comment 136792)