Mozilla ports: new dynamic linking code needed

As part of https://bugzilla.mozilla.org/show_bug.cgi?id=298044 , the 
various operating system ports of mozilla may need to write dynamic 
linking code in order for the XPCOM glue to work correctly (which is a 
basic requirement for the new XULRunner). I have written this code for 
Windows, Mac OS X, and *nix systems that use dlopen() APIs, which are 
the operating systems that I have access to. I would like the ports 
owners for other systems to please look through the patch I have posted 
in the bug and provide equivalent code for your operating system.

If you have any questions, please do not hesistate to contact me by 
email or post comments in the bug.

--BDS