python-setuptools: bump version to 2.1.2

[Thomas: bump to 2.1.2 instead of 0.8, remove comment that no longer
made sense about setuptools being forked.]

Signed-off-by: Rohan Fletcher <rohfledev@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>