Lua : Add testrunner behavior for lua

std/haxe/unit/TestRunner.hx

@@ -69,7 +69,7 @@ class TestRunner {
 			untyped __java__("java.lang.System.out.print(str)");
 		#elseif python
 			python.Lib.print(v);
-		#elseif hl
+		#elseif (hl || lua)
 			Sys.print(Std.string(v));
 		#end
 	}