Compile new Yun image

Official Hardware Classic Yún
6

Openwrt ar71xx image compile:

http://buildbot.openwrt.org:8010/builders/ar71xx/builds/494

Timing:
Start	Sun Apr 27 19:45:15 2014
End	Mon Apr 28 05:30:52 2014
Elapsed	9 hrs, 45 mins, 37 secs

The new Yun image compile:

Timing:
real    332m7.085s
user    2090m27.984s
sys     159m52.728s

Elapsed 5 hrs, 32 mins, 7 secs

Ha, We are faster...