fixed partition ID in uboot dat

resources/scripts/ab_flash

@@ -18,9 +18,9 @@ sha256sum -c ${image_file}.sha256
 current_idx=$(rdev | sed 's#/dev/mmcblk0p\([^ ]*\).*#\1#')
 
 if [ $current_idx -eq 2 ]; then
-    echo "Start update for partition B"
-else
     echo "Start update for partition A"
+else
+    echo "Start update for partition B"
 fi
 
 flash_device="/dev/mmcblk0p${flash_idx}"