Backend: only take relevant files for debug .tgz

- per suggestion from eng.stk avoid archiving all of $home since /tmp in recovery might hold sensitive crypto data
- restrict tar to $home (i.e. /tmp/anykernel by default) and $parent/recovery.log (i.e. /tmp/recovery.log)
- probably no need to be verbose when making the archive, it kinda clutters up the end of the captured log

META-INF/com/google/android/update-binary

@@ -38,7 +38,7 @@ debugging() {
   case $(basename "$ZIPFILE" .zip) in
     *-debugging)
       ui_print " " "Creating debugging archive in $DIR...";
-      $bb tar -czvf "$DIR/anykernel3-$(date +%Y-%m-%d_%H%M%S)-debug.tgz" $parent/*;
+      $bb tar -czf "$DIR/anykernel3-$(date +%Y-%m-%d_%H%M%S)-debug.tgz" $home $parent/recovery.log;
     ;;
   esac;
 }