Add XDA thread URL for Wileyfox Swift

Change-Id: I9ec5ff205c71f39bb1967b6accb47f7383bba5e1
diff --git a/_devices/wileyfoxswift.markdown b/_devices/wileyfoxswift.markdown
index 9978ee2..9579a5f 100644
--- a/_devices/wileyfoxswift.markdown
+++ b/_devices/wileyfoxswift.markdown
@@ -7,6 +7,7 @@
 maintainer: beroid
 oem: Wileyfox
 devicetree: https://github.com/teamwin/android_device_wileyfox_crackling
+xdathread: "http://forum.xda-developers.com/showthread.php?t=3350351"
 ---
 
 {% include disclaimer.html %}