[mcclim-devel] mcclim-freetype CCL fix

mcclim-freetype.asd uses a custom asdf class, namely uncompiled-cl-source to enforce that "freetype-ffi.lisp" is loaded as source. I'm not sure what are the technical reasons for this but replacing uncompiled-cl-source with a regular :file gives a lot of errors.

The uncompiled-cl-source workaround does not work with CCL as it expects output to the derived output files. I fixed the workaround (that's all I can do given my insight into compiled FFI fasls) by checking whether input or output are equal. If they are not, copy input-file to output-file.

Here is the beauty-below-average patch.