[Ohrrpgce] SVN: teeemcee/11175 scons: try to fix compiling on arm devices, also future-proof for win64

[subversion at HamsterRepublic.com]

teeemcee
2019-07-18 17:31:36 -0700 (Thu, 18 Jul 2019)
160
scons: try to fix compiling on arm devices, also future-proof for win64

Previously, according to Sword you had to do `scons arch=armv7-a` to compile
on an RPi.
---
U   wip/SConscript
U   wip/ohrbuild.py