move import of windows.js out of GenericGCC.qbs

Change-Id: I5429af5524cc4adbf889e305cafce55f409624f1
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
move import of bundle-tools.js to path-tools.js

And remove it from where it isn't needed.

Change-Id: I51dc33e1dce4fd43b7b3080ef6e277e7c6b9b725
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>
import qbs.FileInfo in darwin-tools.js

Also remove now superfluous imports.

Change-Id: I548b6b0c2f3ff06472cfb40c579af7d9c65ed21f
Reviewed-by: Christian Kandeler <christian.kandeler@digia.com>