#1039 cffi clos wrapper code out of date

[Glen Henshaw]

When using cffi support, SWIG generates CLOS wrapper code that uses a CLOS: package prefix for defmethod, defclass, etc. But in nearly every modern lisp there is no longer a CLOS package, so loading the code causes lisp to thrown errors about an unknown package. My more experienced lisp colleague tells me separate CLOS packages were phased out of most implementations starting about 1993...

Can we get the CLOS: prefix turned off?

[William Fulton]

Closing all open CFFI issues as CFFI has been disabled, please see https://github.com/swig/swig/issues/1447