Hi Julien,

Thanks very much for investigating and producing a working fix for this
issue!  It is a great relief to remove this item from my TODO list :)

I have a few minor nits, and am currently testing a slight variant of
your proposed patch, attached below.  I made the following changes:

* I added a new phase instead of augmenting the existing
  'link-libxul-with-libraries' phase, since the name of the existing
  phase doesn't match what's being done here.

* I leave the numeric suffixes (version number) of the shared library
  names unchanged, instead of stripping them as you did.

* I used "\\." in the regexp to strictly match that character.

* I moved the rationale comment from the commit log into the code.

What do you think?

   Thanks again!
       Mark