The program hwh_to_c++ converts the Hardware Handoff (HWH) file that's
inside a Xilinx XSA file into c++ files for use with software.

The build.sh script adds extracting the XSA (with unzip) to get the HWH,
and also looping over all XSA files put into the inputs directory,
so that c++ files for each are put into the out directory.
