Set RTS -N2 to zephyr to make circleci happy

Author: rnons

frontend/scripts/build.sh

@@ -4,6 +4,6 @@ rm -rf ../backend/dist/*.{css,js}
 
 spago build -u "-g corefn +RTS -N2 -RTS"
 
-zephyr -f Home.main Talk.main Search.main
+zephyr -f Home.main Talk.main Search.main +RTS -N2 -RTS
 
 NODE_ENV=production webpack -p --progress