add printing to TestRunner

std/haxe/unit/TestRunner.hx

@@ -84,6 +84,8 @@ class TestRunner {
 		#elseif java
 			var str:String = v;
 			untyped __java__("java.lang.System.out.print(str)");
+		#elseif python
+			python.Lib.print(v);
 		#end
 	}