twrpme: add gitactivity changelog tag to device markdowns

Change-Id: I437a42c1b2ccd79b3f85ad0962c362680c28d171
diff --git a/_devices/xiaomiredminote4gsinglesim.markdown b/_devices/xiaomiredminote4gsinglesim.markdown
index b081aa1..2ae4e76 100644
--- a/_devices/xiaomiredminote4gsinglesim.markdown
+++ b/_devices/xiaomiredminote4gsinglesim.markdown
@@ -5,6 +5,7 @@
 downloadfolder: dior
 supportstatus: Current
 maintainer: myhellonearth
+devicetree: https://github.com/TeamWin/android_device_xiaomi_dior.git
 oem: Xiaomi
 ---