Bug#779724: build pyfftw everywhere

[Matthias Klose]

Package: src:pyfftw
Version: 0.9.2+dfsg-2
Tags: patch

ARM32 and probably mips* don't have the long double fftw3 libs, however these
don't seem to be needed for the build.

patch to build on ARM32:
http://launchpadlibrarian.net/199352566/pyfftw_0.9.2%2Bdfsg-2_0.9.2%2Bdfsg-2ubuntu1.diff.gz

Don't disable on arm64 and ppc64el. These architectures have long double libs.