privat/nit — pull request #874 by privat (2014-11-04 16:43:38+00:00)
Title: Pkgconfig

Generalize the usage of pkg-config so that this command is executed by the Makefile and not the nitg compiler.

This will improve the portability of programs when the .nit_compile directory is distributed.
And thus, the initial bootstrap with `c_src`.

This is a first step toward the resolution of #864.