Fixed cocoa build script to work with Python 3.3.

cocoa/wscript

@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 
+import sys
 import os
 import os.path as op
 
@@ -25,8 +26,9 @@ def configure(conf):
     # I did a lot of fiddling-around, but I didn't find how to tell WAF the Python library name
     # to look for without making the whole compilation process fail, so I just create a symlink
     # with the name WAF is looking for. 
-    if not op.exists('../build/libpython3.2.dylib'):
-        os.symlink('../build/Python', '../build/libpython3.2.dylib')
+    versioned_dylib_path = '../build/libpython{}.dylib'.format(sys.version[:3])
+    if not op.exists(versioned_dylib_path):
+        os.symlink('../build/Python', versioned_dylib_path)
     # The rest is standard WAF code that you can find the the python and macapp demos.
     conf.load('compiler_c python')
     conf.check_python_version((3,2,0))