nmap: update to 6.46

Updated to later version on nmap.
remove patch which is included in update
Added ndiff package
Include zenmap build changes but commented out for now and untested

Signed-off-by: Armin Kuster <akuster@mvista.com>
add image and packagegroups

Add initial image and packagegroup

Signed-off-by: Armin Kuster <akuster@mvista.com>