[PATCH] Add support for nowait and depend clauses in target construct in 4.1

[Andrey Churbanov]

I've committed the patch in 3 parts:
rev. 236744 - new headers;
rev. 236746 - build changes;
rev. 236753 - code changes.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9306

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