Brought back setting primary suite which simplified remote execution setup.

com.oracle.truffle.r.native/run/Rscript_exec.sh

@@ -42,4 +42,4 @@ else
     mx=`which mx`
 fi
 
-exec $mx $MX_R_GLOBAL_ARGS Rscript $MX_R_CMD_ARGS "$@"
+exec $mx --primary-suite-path $PRIMARY_PATH $MX_R_GLOBAL_ARGS Rscript $MX_R_CMD_ARGS "$@"