qtgui: fixed an issue with the number sink mistreating non-float inputs.

Dealing with ints will require an api change.
volk: add neon kernel for 16i_convert_8i
volk: add neon kernels for 32fc->32f deinterleavers
volk: removing executable bit for volk_32f_x2_pow_32f.h
volk: add neon support for 32fc_s32fc_multiply_32fc
volk: popcnt support

Add a neon protokernel for 64-bit popcnt, and puppets so 64-bit and
32-bit versions can be tested with volk_profile
volk: adding popcnt puppets to qa