menu: Add MENU GOTO support to the MENU DEFAULT parsing code

menu: Add MENU GOTO support to the MENU DEFAULT parsing code

Tomas reported that the 'test1' submenu in the following config file
snippet doesn't honour the MENU DEFAULT directive,

    MENU BEGIN test0
       MENU START
       LABEL -
       MENU DEFAULT
       MENU LABEL OptionA
       MENU GOTO test1
    MENU END

    MENU BEGIN test1
       LABEL -
       MENU LABEL OptionA1
       MENU GOTO test0
       LABEL -
       MENU DEFAULT
       MENU LABEL OptionB1
       MENU GOTO test0
    MENU END

The reason is that the menu config code doesn't know how to handle a
default item that is a MENU GOTO directive. A trivial addition to the
code in record() fixes this.

Reported-by: Tomas M <tomas@slax.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>