Add old casacore include dir
Created by: tammojan
This is to work around the fact that StationResponse.h until very recently used the old casacore include path (without the casacore prefix). The error thrown during build was:
In file included from /home/installdir/lofar/include/StationResponse/AntennaField.h:36:0,
from /home/installdir/lofar/include/StationResponse/Station.h:32,
from /home/installdir/DP3/DPPP/DPInput.h:36,
from /home/installdir/DP3/DPPP/MSReader.h:30,
from /home/installdir/DP3/DPPP/DPRun.h:31,
from /home/installdir/DP3/DPPP/DPRun.cc:24:
/home/installdir/lofar/include/StationResponse/ITRFDirection.h:32:41: fatal error: measures/Measures/MeasFrame.h: No such file or directory
compilation terminated.