Remove repeated build information

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Fix ethtool execution

Use "su --session-command" in order to skip
environment constraints.

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
bumping version number to 1.4

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>