[ros-kernel] some patches to fix some warnnings

[Jonathan Wilson]

> No, I can not provide a sollution that satisfies your demands other than
> adding -Wno-format. But this will disable format checks entirely. You will
> have to choose between two evils.
-Wno-format for the affected modules is probobly the solution then.
Will re-jig the patch to put %i64 and %wZ back and add -wno-format for 
these things.

That way, any other warnings will still get flagged.