[PATCH] MCParser: introduce Note and use it for ARM AsmParser

[Renato Golin]

  Hi Saleem,

  This patch makes sense to me, since that's not always the error, and the error is already marked as so.

  Though, I'd wait for Jim's or Logan's review before commit, as that's slipping away a bit from my area of expertise.

  cheers,
  --renato

http://llvm-reviews.chandlerc.com/D2482