We should relocate GPT backup to the end of disk

init

@@ -28,8 +28,13 @@ rootdevice() {
 }
 
 freespaceafter() {
+    local label
     local escaped
     local start
+    label="$(sfdisk -d $1 2> /dev/null | sed -n 's/^label: *//p')"
+    if [ $label = "gpt" ]; then
+	sfdisk --relocate gpt-bak-std $1 > /dev/null
+    fi
     escaped="$(echo ""$2"" | sed 's|/|\\/|g')"
     start="$(sfdisk -d $1 2> /dev/null | sed -n "/$escaped/p" | sed -r 's/.*start=\s*([0-9]+),.*/\1/g')"
     sfdisk -q -F $1 2> /dev/null | sed -n '/^\s*[0-9]/p' | sed -r 's/^\s*([0-9]+)\s.*/\1/g' | while read freespace