Coccinelle

[Nils Goroll]

Re Dridi in 4edaa2836c6aba837899b78866a2567c704e336b:

> Asking again, could we consider keeping Coccinelle patches around?

I think it would make a lot of sense to automate coding conventions. Ideally,
make check would fail if any of them are not met.

As I got zero experience with coccinelle my only concern would be how to mark
exceptions. Is there anything similar to flexelint hints?

At any rate, +1 for adding the patches to the tree.

Nils