tools: add utils module banner to all check scripts

This patch adds utils module banner to all check scripts.
It also makes all check scripts to have the same style in
string creation using only single quotes and wrapp the main
file.

Signed-off-by: Leandro Belli <leandro.belli@arm.com>
Change-Id: I2ae82f84a41a50713189bd4eda999c5ea89ef82f