Provide an environment variable that can be used to override setting --warn=no-visual-c-missing when trying to run the new timing-script infrastructure against older versions of SCons that don't have that warning.
Provide an environment variable that can be used to override
setting --warn=no-visual-c-missing when trying to run the new
timing-script infrastructure against older versions of SCons that
don't have that warning.


git-svn-id: 7892167f69f80ee5d3024affce49f20c74bcb41d@4545 fdb21ef1-2011-0410-befe-b5e4ea1792b1

azverkan/scons,azverkan/scons,azverkan/scons,azverkan/scons,azverkan/scons