Fix a bunch of trivial cases of 'CHECK[^:]*$' in the tests. NFCI

Fix a bunch of trivial cases of 'CHECK[^:]*$' in the tests. NFCI

I looked into adding a warning / error for this to FileCheck, but there doesn't
seem to be a good way to avoid it triggering on the instances of it in RUN lines.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244481 91177308-0d34-0410-b5e6-96231b3b80d8