Updating a link in the comments; no functional change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185013 91177308-0d34-0410-b5e6-96231b3b80d8
Updating the same comment in a different file, again for links.  No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@185014 91177308-0d34-0410-b5e6-96231b3b80d8