Keep top cmake sof answers up-to-date.
I know this is often discussed that documentation can get some improvements, but it is not always clear what should be done. I want to suggest keeping top 20 (or whatever) answers on stackoverflow tagged with cmake up-to-date with recent cmake version. To increase a chance of promoting best practices these answers should be updated by maintainers of cmake. I guess that it is correct to consider top questions relevant to actual usecases and therefore updating answers to them will be useful.