use humanReadableSize method from ifw lib
use humanReadableSize method from ifw lib

Change-Id: I9c084e3dd57848852810dfbcce8245bf66646867
Reviewed-by: Karsten Heimrich <81d67632fe4bf9afb88a400b41aa25e19a1d2a12@digia.com>

olear/qtifw,olear/qtifw,olear/qtifw,olear/qtifw