zukz2: Add XDA support thread

Change-Id: Ie8e4ac8dcd02c872a6d67265a950acb41913c9f5
diff --git a/_devices/zukz2.markdown b/_devices/zukz2.markdown
index 806e2d2..805492e 100644
--- a/_devices/zukz2.markdown
+++ b/_devices/zukz2.markdown
@@ -7,6 +7,7 @@
 maintainer: ontherunvaro
 oem: ZUK / Lenovo
 devicetree: https://github.com/TeamWin/android_device_zuk_z2_plus
+xdathread: https://forum.xda-developers.com/lenovo-zuk-z2/development/recovery-official-twrp-3-1-0-zuk-z2-t3587092
 ---
 
 {% include disclaimer.html %}