Suppress "sequential device" warning for other files.

Hides "sequential device" warning for non-icns data.

Task-number: QTBUG-39838
Change-Id: Ib09f519de04a53e9d685b14412c40ee0077fb3d9
Reviewed-by: Ivan Komissarov <ABBAPOH@gmail.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>