[PATCH] [OPENMP] Allow to disable OpenMP support and link libgomp

[Ed Maste]

In http://reviews.llvm.org/D9875#175604, @emaste wrote:

> I'm curious - what is the use case for the old behaviour?


Ah, I found Chandler's explanation for this, in the thread for r237769.


http://reviews.llvm.org/D9875

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