Application: add verbose logs on signal caught
Application: add verbose logs on signal caught

When you're developing an application with hooks on signals, it's
convenient to know when signals are caught.

Change-Id: I290f4fdf21036de480d24970b6668ef0dcb0ee82
Reviewed-on: http://gerrit.aldebaran.lan/47699
Reviewed-by: pdaouadi <fc1eb3334d3fdad315bae23aa166bc70bd434067@aldebaran-robotics.com>
Tested-by: pdaouadi <fc1eb3334d3fdad315bae23aa166bc70bd434067@aldebaran-robotics.com>

bsautron/libqi,aldebaran/libqi,aldebaran/libqi,aldebaran/libqi,vbarbaresi/libqi