Library for wrapping simd calls

Found out about these little gems at the gr summit 09:

http://liboil.freedesktop.org/wiki/
http://www.schleef.org/orc/documentation/

If liboil does what I think it does, we only have to write the code once
with liboil calls, and this library takes care of giving us a fast
vectorized implementation on various platforms.

The internet is a big place, and helpful stuff like liboil could easily
get
missed. If anyone happens to come across a project that could make
gnuradio
faster/smarter, please share the knowledge!

-Josh