Backend: use stderr for consistency with other debug output

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

@@ -472,7 +472,7 @@ if [ -f version ]; then
   ui_print " ";
 fi;
 ui_print " " "AnyKernel3 by osm0sis @ xda-developers" " ";
-$BB grep -oE 'AK_BASE.*' META-INF/com/google/android/updater-script;
+$BB grep -oE 'AK_BASE.*' META-INF/com/google/android/updater-script >&2;
 ui_print " ";
 
 setup_env;

META-INF/com/google/android/updater-script

@@ -3,4 +3,4 @@
 # Dummy file; update-binary is a shell script (DO NOT CHANGE)
 #
 #
-# AK_BASE_VERSION=20211003
+# AK_BASE_VERSION=20211004