[PATCH] Add llvm-c-test tool for testing llvm-c

[Renato Golin]

  Hi,

  This patch breaks the ARM bots, please make sure to add x86 specific tests into x86 specific area. See:

  http://llvm.org/docs/TestingGuide.html#platform-specific-tests

  cheers,
  --renato

http://llvm-reviews.chandlerc.com/D1776