[DRE-maint] Bug#459882: libgemplugin-ruby1.8: makes too many assumptions about gem paths

[Jeremy Lainé]

> cool. I'll try to package gem_plugin 0.2.3 until the weekend and include
> this patch there - will do some testing before, of course.
>
OK thanks! Please note that this patch will not be sufficient to get a
packaged mongrel_cluster to run, it is just a preliminary cleanup.

I will file another bug when I have worked out something for working
with packaged gem plugins.

Cheers,
Jeremy