Run upgrade script from PR21532 to match LLVM changes

Update tests for LLVM assembly format change in r224257 using the script
attached to PR21532.  I'm hoping this unsticks the bot [1].

[1]: http://lab.llvm.org:8011/builders/polly-amd64-linux/builds/25432

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@224269 91177308-0d34-0410-b5e6-96231b3b80d8