Also clean binary builds on "sofin clean"

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Minor improvements. Code cleanup.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Brought backbinary/ library stripping. Big performance improvement of strip task.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>