[Distutils] waf can be used to compile Python extension modules

[Daniel Holth]

One reason people use distutils is because it can compile Python
extension modules. Here's an example from waf that compiles Python
extensions without using distutils. The problem of invoking the
compiler has been solved by many build systems and is not just a
unique and mysterious distutils feature.

https://code.google.com/p/waf/source/browse/#git%2Fdemos%2Fpython