[Avila] make menuconfig

[hong zhang]

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Dear Folks,
   
  I need help on make menuconfig. If I mess up with "make menuconfig" in snapgear, how can I throw away current changes I made through "make menuconfig" and go back to my original one?
   
  .config seems no change after "make menuconfig" in snapgear.
   
  I really appreciate help!
  Thank you!!!
   
  ---henry

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