[samples] Add a linux -> mingw32 -> i686-linux canadian sample

Add a sample that builds on Linux a mingw32-hosted toolchain that
generates code for i686-none-linux-gnu.

Signed-off-by: Bart van der Meulen <bartvdrmeulen@gmail.com>

 reporter_name="Bart vd. Meulen"

 reporter_url=""

 reporter_comment="Sample for building a canadian cross-compiler"