GSL 1.16 update for new SRC_ARCHIVE location.
GSL 1.16 update for new SRC_ARCHIVE location.

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