[PATCH] Option parsing: recognize the special -- token

[Hans Wennborg]

  > We do the same thing in LLD driver. Because you are changing the behavior of OptTable,

  Ah, I didn't know that. This makes the drivers' behaviors more similar, then.

  > I can remove the code handling -- from LLD once you submit this patch?

  Sounds good.

http://llvm-reviews.chandlerc.com/D1274