[Ohrrpgce] SVN: teeemcee/12983 scons: a couple win/wine fixes/tweaks

[subversion at HamsterRepublic.com]

teeemcee
2022-05-31 21:44:19 -0700 (Tue, 31 May 2022)
441
scons: a couple win/wine fixes/tweaks

For some reason running "cv2pdb" (rather than "cv2pdb.exe") with wine stopped
working, maybe a change in wine.

Support envvars on Windows which are quoted paths.

Skip rules for building gfx_directx unless we're explicitly building it, to avoid
the warning (e.g. on the nightly build machine):
 scons: warning: No version of Visual Studio compiler found - C/C++ compilers most likely not set correctly
---
U   wip/SConscript
U   wip/ohrbuild.py