Foris no longer uses python2 so we can drop python2 version.

This reverts commit aeaa8233.

It did not help so let's wait for some free time of kernel developer.

This should consistently expand path to compile_pkgs script no matter if
symbolic link for used or not.

Note: inspired by CCC talk https://media.ccc.de/v/35c3-9788-memsad
It'll be probably removed after we see what portion of packages
this affects.

This reverts commit 91010ef4.

Helped-by: Karel Koci <karel.koci@nic.cz>

Helped-by: Karel Koci <karel.koci@nic.cz>

This reverts commit d38d7a1e.

We foundout why these weird dependencies are there. That is because
dependencies are resolved for whole package not just for specified build
package. This results to build of all python versions even if only one
of them in reality is needed. These dependencies mask that and ensure
that if package is going to be build that its python version is skipped.

This reverts commit 5d175ac8.