[PATCH] Add partial support for the hasDeclaration() matcher in the dynamic layer.

[Manuel Klimek]

  Ok, after thinking a little about this, I think it's fine.
  Now that we have they dynamic matchers hooked up in clang-query I expect error message to become much less of a problem, so LG.

http://llvm-reviews.chandlerc.com/D1889

BRANCH
  has_decl

ARCANIST PROJECT
  clang