Austin Seipp authored Feb 13, 2014 and thoughtpolice committed Feb 17, 2014

As usual, Mac OS X is extremely annoying (or the software is, anyway),
because not only does it load dynamic libraries with the .dylib
extension, but also the .so extension. For whatever reason. At least
it's easy to fix.

Signed-off-by: Austin Seipp <austin@well-typed.com>
(cherry picked from commit dc080915)