http: replaces prune_out script with make rules

http/bin/prune_out

@@ -1,32 +0,0 @@
-#!/bin/sh -e
-
-for out in $(find out -type f)
-do
-	out_basename="$(basename "$out")"
-	out_ext="${out_basename##*\.}"
-	rel_path="$(echo "${out}" | cut -c5-)"
-
-	if [ -f "public/${rel_path}" ]; then
-		continue
-	fi
-
-	base_rel_path="${rel_path%%.${out_ext}}"
-	src_path="src/${base_rel_path}.upp${out_ext}"
-	if [ -f "$src_path" ]; then
-		continue
-	fi
-
-	for layout in $(find share/layouts -name "*.layout.upp${out_ext}"); do
-		layout="$(basename "$layout")"
-		layout="$(echo ${layout} | cut -c1-$(( ${#layout} - 15 )) )"
-		rel_path="$(echo "${out}" | cut -c5-)"
-		base_rel_path="${rel_path%%.${out_ext}}"
-		src_path="src/${base_rel_path}.${layout}.upp${out_ext}"
-		if [ -f "$src_path" ]; then
-			continue 2
-		fi
-	done
-
-  echo "No source file found to match ${out}: removing it"
-	rm "$out"
-done