Adds simple utility to do execution diffs.

diff_test

@@ -0,0 +1,3 @@
+#!/usr/bash
+
+colordiff -y --difftype=diffy <(js build/ts/shell.js -x -bl $1) <($AVM $1)

test/avm2/Makefile

@@ -18,8 +18,4 @@ BUILTIN_ABC = ../../src/avm2/generated/builtin/builtin.abc
 all:
 	for file in $(SOURCES) ; do  \
 	  java -jar $(ASC) -d -md -import $(BUILTIN_ABC) $$file; \
-	  echo $$file; \
-	done
-
-
-
+	done