llvm-svn: 353020

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SVN tag also included these previous commits:

Author: Krzysztof Parzyszek <kparzysz@quicinc.org>
Date: Fri Feb 01 20:44:40 2019 +0000

    [Hexagon] Update release notes with the changes to the Hexagon backend
    
    llvm-svn: 352912

Author: Hans Wennborg <hans@hanshq.net>
Date: Thu Jan 24 00:44:29 2019 +0000

    Creating release candidate rc1 from release_800 branch
    
    llvm-svn: 352000