R 3.5.0: updated to use fftw/3.3.6-pl2/gnu-4.9.2.
R 3.5.0: updated to use fftw/3.3.6-pl2/gnu-4.9.2.

UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts,UCL-RITS/rcps-buildscripts