disable the SDK for now, it's more broken than imagebuilder and needs careful treatment
FWIW, why doesn't someone make package/imagebuilder/ ? that could especially use the new ./extra directory helper (cf. package/buildhlp.mk)
git-svn-id: svn://www.freewrt.org/trunk/freewrt@519 afb5a338-a214-0410-bd46-81f09a774fd1