Add work-around for RPM build on SCons 2.3.0
Add work-around for RPM build on SCons 2.3.0

This forces the correct LC_ALL=C setting for rpmbuild, which older
versions of scons set to a lowercase c, sometimes breaking things.

logcabin/logcabin,TigerZhang/logcabin,gaoning777/logcabin,tempbottle/logcabin,dankenigsberg/logcabin,TigerZhang/logcabin,gaoning777/logcabin,tempbottle/logcabin,TigerZhang/logcabin,dankenigsberg/logcabin,dankenigsberg/logcabin,gaoning777/logcabin,logcabin/logcabin,gaoning777/logcabin,chaozh/logcabin,chaozh/logcabin,chaozh/logcabin,TigerZhang/logcabin,dankenigsberg/logcabin,tempbottle/logcabin,tempbottle/logcabin,logcabin/logcabin,chaozh/logcabin,logcabin/logcabin