wigleyHull tutorial: add clean-up script

tutorials/multiphase/LTSInterFoam/wigleyHull/Allclean

+#!/bin/sh
+cd ${0%/*} || exit 1    # run from this directory
+
+# Source tutorial clean functions
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions
+
+cleanCase
+rm 0/alpha1.gz 0/cellLevel.gz 0/pointLevel.gz constant/polyMesh/boundary \
+    > /dev/null 2>&1
+
+# ----------------------------------------------------------------- end-of-file