add exclude option for build_maxlen_filter.sh for schema.json

Signed-off-by: Marek Küthe <m.k@mk16.de>

build_maxlen_filter.sh

@@ -6,6 +6,7 @@ if ! jq --version &> /dev/null; then
 fi
 
 for file in *.json; do
+    [[ $file =~ ^(schema.json)$ ]] && continue
     for prefix in $(jq -r ".route | keys[]" "$file"); do
         prefixlen=$(echo "$prefix" | cut -d "/" -f2)
         maxlen=$(jq -r ".route.\"$prefix\".\"max-len\"" "$file")