[tests] add a test for #9692

tests/misc/projects/Issue9692/Main.hx

@@ -0,0 +1,4 @@
+function main() {
+	var Foo = "";
+	trace("" is Foo);
+}

tests/misc/projects/Issue9692/compile-fail.hxml

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

tests/misc/projects/Issue9692/compile-fail.hxml.stderr

@@ -0,0 +1 @@
+Main.hx:3: characters 14-17 : Type not found : Foo