Creating release candidate rc1 from release_391 branch

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Merging r280120:

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r280120 | niels_ole | 2016-08-30 11:00:22 -0700 (Tue, 30 Aug 2016) | 4 lines

Basic/Targets.cpp: Add polaris10 and polaris11 gpus

Differential Revision: https://reviews.llvm.org/D23746

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llvm-svn: 288149
1 file changed