[PATCH] [ARM] Remove dead code for target architectures with a '-' in the name

[Renato Golin]

  Hi Bradley,

  So you mean that the string "armv7-a" will be parsed *always* as "armv7a"?

  TBH, I don't know why such cases are there, but I assumed some Darwin-specific nomenclature. If the surrounding code already changes that, then I'm fine on removing the cases. Can you add some lines to a test just to make sure "armv7-a" still parses as v7a?

http://llvm-reviews.chandlerc.com/D1695