improve tests (#3405)

test/release/jetstream.js

@@ -0,0 +1,9 @@
+require("./run")([
+    "-mc",
+    "-mc keep_fargs=false,passes=3,pure_getters,unsafe,unsafe_comps,unsafe_math,unsafe_proto",
+].map(function(options) {
+    var args = options.split(/ /);
+    args.unshift("test/jetstream.js");
+    args.push("-b", "beautify=false,webkit");
+    return args;
+}));