hg: openjfx/9-dev/rt: 8154203: Use StackWalker instead of the now-deprecated sun.reflect.Reflection class

[kevin.rushforth at oracle.com]

Changeset: 70f6fa01a32c
Author:    kcr
Date:      2016-04-14 14:16 -0700
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/70f6fa01a32c

8154203: Use StackWalker instead of the now-deprecated sun.reflect.Reflection class
Reviewed-by: vadim, alanb

! modules/fxml/src/main/java/javafx/fxml/FXMLLoader.java