fix(rpm-ostree): Symlinking /opt/ multiple times caused an error

modules/rpm-ostree/rpm-ostree.sh

@@ -45,7 +45,7 @@ if [[ ${#OPTFIX[@]} -gt 0 ]]; then
     echo "Creating symlinks to fix packages that install to /opt"
     # Create symlink for /opt to /var/opt since it is not created in the image yet
     mkdir -p "/var/opt"
-    ln -s "/var/opt"  "/opt"
+    ln -snf "/var/opt" "/opt"
     # Create symlinks for each directory specified in recipe.yml
     for OPTPKG in "${OPTFIX[@]}"; do
         OPTPKG="${OPTPKG%\"}"