Add script to compare order of oplist and interp.c op order

This script is fairly simple and shows a diff of the ordering
differences between the order of the switch in interp.c and the oplist.

tools/compare-oplist-interp-order.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env sh
+# This tool compares the order of things in oplist-order with interp-order
+# Shows diff output in less as `diff oplist-order interp-order`
+get_oplist_order () {
+    grep -vE '(^#)|(^\s*$)' src/core/oplist | sed -E 's/^(\S+)\s*.*/\1/'
+}
+get_interp_order () {
+    grep -F 'OP(' src/core/interp.c | grep -v '^#' | sed -E 's/^\s*OP\(([^)]+)\).*/\1/'
+}
+if [ "$1" == 'get_oplist_order' ]; then
+    get_oplist_order
+    exit 0
+fi
+get_oplist_order > /tmp/oplist-order.txt
+get_interp_order > /tmp/interp-order.txt
+diff -aur /tmp/oplist-order.txt /tmp/interp-order.txt | less
+rm /tmp/oplist-order.txt
+rm /tmp/interp-order.txt