Complete HELLO_WORLD version as a kernel module

[olexandr-konovalov]

https://github.com/gap-packages/example/blob/master/src/hellod.c has a prototype of a HELLO_WORLD example implemented as a kernel module. It has to be checked, completed, added to the test and documented.

[olexandr-konovalov]

Furthermore, I suggest to replace an example which uses an external binary, but the example that uses the kernel module, prepared with PackageMaker. There is no need to provide a setup for standalone binary, which needs not to be standard, but an example of a kernel module, adapted to a new build system, would really be useful.

[ChrisJefferson]

I think it would be a bad idea to run PackageMaker and cut+paste the result into Example -- the whole idea of PackageMaker is each user runs it themself. @fingolfin might have a stronger opinion than me.

[fingolfin]

I tnd to agree with @ChrisJefferson . I'd rather have an example using gac. And I am thinking about changing PackageMaker to generate package skeletons without automake, and perhaps without autoconf, too, if my build system revisisons get merged