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>

 # m68k specific configuration file

 ## select ARCH_SUPPORTS_32

 ## select ARCH_DEFAULT_32

 ## select ARCH_DEFAULT_BE

 ## select ARCH_SUPPORTS_WITH_CPU

 ##

 ## help The m68k architecture