Recipes for Python extensions are simple.
These recipes usually only need to point to the source's archive and then inherit
the proper .bbclass file.
Building is split into two methods dependling on which method the module authors used.
Extensions that use an Autotools-based build system require Autotools and
distutils-based .bbclasse files in their recipes.
Extensions that use distutils-based build systems require
distutils.bbclass in their recipes.