Set CMAKE_SKIP_INSTALL_RPATH=ON for static builds on 'mutrino' (TRIL-241)
Created by: bartlettroscoe
CC: @bathmatt, @jmgate, @krcb
This is needed to get around an install error on 'mutrino' (see TRIL-241).
NOTE: This needed a FORCE set for the cache var since CMake seems to set the default as 'NO'!