Added -j option to build_coupled_nek.sh

examples/template_example/build_coupled_nek.sh

 #k!/usr/bin/env bash
+
 NEK_CASENAME="$(basename $(pwd))"
 NEK_SOURCE_DIR="$(dirname $(dirname $(pwd)))/Nek5000"
 
+JOBS=4
+while getopts ":j:" opt; do
+  case $opt in
+    j ) JOBS=$OPTARG ;;
+  esac
+done
+
 # MOOSE issues a warning if these directories do not exist.
 # Creating these dirs will suppress that warning
 mkdir -p src
@@ -20,7 +28,7 @@ echo "Building Nek5000 objects..."
 $NEK_SOURCE_DIR/core/makenek $NEK_CASENAME $NEK_SOURCE_DIR
 
 echo "Building libNek5000.a..."
-make -f makefile.nek lib
+make -j $JOBS -f makefile.nek lib
 
 echo "Building MOON driver..."
-make
+make -j $JOBS