ne10: Use http instead of git method for package fetching.

Rework package fetching according official documentation:
http://buildroot.uclibc.org/downloads/manual/manual.html#github-download-url



Signed-off-by: Marek Belisko <marek.belisko@open-nandra.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>