Scons: SiteTools: xpcc: hand defines from project.cfg to g++
Scons: SiteTools: xpcc: hand defines from project.cfg to g++

chrism333/xpcc,dergraaf/xpcc,chrism333/xpcc,dergraaf/xpcc,chrism333/xpcc,chrism333/xpcc,dergraaf/xpcc,dergraaf/xpcc