Comment 16 for bug 1449875

You should just set texlive-lang-cjk as an *actual* Suggest: for ghostscript, not a Recommend:
Why? -
Well the Ubuntu image will not contain that package nor any texlive packages so the bug will still be present to the relatively few affected.
For them to fix they'd need to install texlive-lang-cjk manually anyway. (here texlive-lang-cjk is not a *listed* Recommend: of ghostscript or libgs9 or libgs9-common

The state or plight of users running an existing 15.10 dev install is irrelevant for the most part.