[tests] add test for generated locals vs user vars

tests/misc/projects/Issue11176/Main.hx

@@ -0,0 +1,6 @@
+function main() {
+	var cost = [1, 2, 3];
+	var _g = [];
+	for (x in cost) _g.push("" + x);
+	_g.join(" ");
+}

tests/misc/projects/Issue11176/compile.hxml

@@ -0,0 +1 @@
+-main Main