[SCons] Workaround for SCons bug under Cygwin
[SCons] Workaround for SCons bug under Cygwin

See SCons Issue 2911.
http://scons.tigris.org/issues/show_bug.cgi?id=2911

Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera,Heathckliff/cantera,Heathckliff/cantera,Heathckliff/cantera,imitrichev/cantera,imitrichev/cantera