Added dependencies to the script

Signed-off-by: Enris Nogare von Tein <ent13@inf.ufpr.br>

useful/stg312/dependencies.sh

+apt-get update
+apt-get install -y squashfs-tools
 apt-get install -y libjansson-dev
 apt-get install -y libjansson4
 apt-get install -y python_setuptools