[PATCH] Fix flakiness in fp16-promote.ll

[Pirama Arumuga Nainar]

Thanks Ahmad, Michael.

For future reference, how do I check the status of the bots?  In lab.llvm.org:8011/grid, I see the nightly tests are failing, but couldn't find any reference failure of this test.


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http://reviews.llvm.org/D9112

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