Drop CFLAGS from SConstruct
Drop CFLAGS from SConstruct

There are no c files in the repo anymore. All the warnings are set only
for C++ now.

logcabin/logcabin,TigerZhang/logcabin,gaoning777/logcabin,jimpelton/mingle-logcabin,jimpelton/mingle-logcabin,nhardt/logcabin,dankenigsberg/logcabin,tempbottle/logcabin,TigerZhang/logcabin,chaozh/logcabin,dankenigsberg/logcabin,dankenigsberg/logcabin,nhardt/logcabin,tempbottle/logcabin,nhardt/logcabin,TigerZhang/logcabin,tempbottle/logcabin,gaoning777/logcabin,TigerZhang/logcabin,nhardt/logcabin,dankenigsberg/logcabin,chaozh/logcabin,gaoning777/logcabin,logcabin/logcabin,gaoning777/logcabin,chaozh/logcabin,logcabin/logcabin,chaozh/logcabin,tempbottle/logcabin,logcabin/logcabin,jimpelton/mingle-logcabin