[Libreoffice] helpex tool is broken

[Andras Timar]

Hi Caolan,

You cleaned up l10ntools' code lately. Now helpex tool does not work
as expected. It should extract translations from sdf files and merge
them to xhp files. Now it merges English strings to everywhere. Could
you please check what went wrong? I tried to git bisect but l10ntools
module was not always buildable, so I could not find the single commit
that broke the functionality.

Thanks,
Andras