pucrunch step failing due to printf printing literal '\x00\x50' string to build/tmp.bin rather than bytes

[randyrossi]

I was getting this error from pucrunch step:

Only programs from 0x0258 to 0xffff can be compressed
(the input file is from 0x785c to 0x1285b)

Problem was due to printf statement printing a literal string '\x00\x50' rather than the loadbytes 00 50 as expected.

To fix the build, I added

SHELL := /bin/bash

to the top of the Makefile.

Then the build worked.