Adds libxc 4.2.3 with GNU compilers
Adds libxc 4.2.3 with GNU compilers

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