added svm cffi bindings and examples/svm-test.lisp

[ormf]

as the title suggests ;-)

check with:

(ql:quickload "opencl-examples") (opencl-opengl-examples:svmtest)

[ormf]

Tried to keep the style consistent, hope I succeeded.

[ormf]

sorry for closing/reopening, thought it'd close the window.

[3b]

Thanks for the patch, didn't realize anyone was still using this :) Might take me a while to look at it, but will try to get it merged eventually.