z2x: Add xda thread link

Change-Id: I2b9e9bee01c422d1f8a041c108a8fe94a51588a8
diff --git a/_zuk/zukz2x.markdown b/_zuk/zukz2x.markdown
index 0aaf473..21b3eb7 100644
--- a/_zuk/zukz2x.markdown
+++ b/_zuk/zukz2x.markdown
@@ -7,6 +7,7 @@
 maintainer: Rygebin
 oem: ZUK
 devicetree: https://github.com/TeamWin/android_device_zuk_z2x
+xdathread: https://forum.xda-developers.com/zuk-edge/development/official-twrp-3-1-1-0-zuk-edge-t3681176
 ---
 
 {% include disclaimer.html %}