fix F-Droid Privileged Extension

* had wrong license
* missing subdir= so APK not found
* we're ready for auto-updates!

metadata/org.fdroid.fdroid.privileged.txt

@@ -1,5 +1,5 @@
 Categories:System
-License:GPLv3+
+License:Apache2
 Web Site:https://f-droid.org
 Source Code:https://gitlab.com/fdroid/privileged-extension
 Issue Tracker:https://gitlab.com/fdroid/privileged-extension/issues
@@ -43,9 +43,10 @@ Build:0.1,1050
 
 Build:0.2,2000
     commit=0.2
+    subdir=app
     gradle=yes
 
-Auto Update Mode:None
-Update Check Mode:Static
+Auto Update Mode:Version %v
+Update Check Mode:Tags
 Current Version:0.2
 Current Version Code:2000