Patching Jamroot script for luabind to also look for .dylib shared objects

Jamroot.diff

diff --git a/Jamroot b/Jamroot
index 94494bf..e0d95f7 100755
--- a/Jamroot
+++ b/Jamroot
@@ -84,7 +84,7 @@ else if [ os.name ] in LINUX MACOSX FREEBSD
     local lib = $(prefix)/lib ;
 
     local names = liblua5.1 liblua51 liblua ;
-    local extensions = .a .so ;
+    local extensions = .a .so .dylib ;
 
     library = [ GLOB $(lib)/lua51 $(lib)/lua5.1 $(lib)/lua $(lib) :
         $(names)$(extensions) ] ;