infozip: new package

This commit adds a package for infozip, compression and file
packaging/archive utility.

[Peter: fix trailing spaces in help, long line]
Signed-off-by: Jan Pedersen <jp@jp-embedded.com>
Acked-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>