Ubuntu packages for armhf architectures

Just a quick note that we have got armhf builds enabled for our gqrx/snapshots repository. Armhf refers to ARM architecture with hardware floating point support.

For now I have rebuilt all packages for Ubuntu 12.04 as this seems to be most common Ubuntu used on ARM devices. Later I will also rebuild for Ubuntu 13.04 but there are limits on how much resources one can use when building for armhf and I have to watch out not to abuse this service.

I can imagine that gqrx may not be very useful on all arm devices; however, I hope that at least the driver libraries, the command line tools and maybe even gnuradio itself will be useful.

Feedback is welcome.