Merging r366510:

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r366510 | efriedma | 2019-07-19 00:35:45 +0200 (Fri, 19 Jul 2019) | 6 lines

Update polly test for SCEV change.

r366419 adds nsw to more SCEV expressions, which allows polly to
make more aggressive assumptions about the input expressions.


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llvm-svn: 366767