samples: check if update is needed

Add a ct-ng action to check if samples needs being updated.
This will be usefull when the config options change.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

 reporter_name="Yann Diorcet <diorcet.yann@gmail.com>"

 reporter_url=""

 reporter_comment="Config to build cross-compiler with mingw as kernel type for

 32 bits Windows target"