Unable to build for ARM

[tranzmatt]

I can't build for ARM based platforms. The default configure script sets up for x86 regardless of platform detected (and fails because it can't find xmmintrin.h), but if I enable neon, I get failures like this:

../../../src/dsp/convolve_neon.c:27:10: fatal error: openphy/convolve.h: No such file or directory
#include "openphy/convolve.h"
^~~~~~~~~~~~~~~~~~~~