linux-sun7i updated and widelands added

Hi, there!

I've updated the linux-sun7i to better support the cubietruck. It still should run fine with cubieboard2 or other sun7i devices, but it would be nice if someone could test this.

WARNING: I'm almost sure this kernel _WILL BREAK_ current installation, because it most likely needs a more current version of u-boot. I have not tested this with exactly this kernel package, but had a lot of trouble with kernel package because u-boot in the uboot-cubiebard2 package is to old.

I also added a modiefied version of the widelands PKGBUILD to build (at least) on armv7h (I made no platform specific changes, so it should run fine on all other platforms, too).

Regards,
maribu