Update a comment to match current core issues list.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193970 91177308-0d34-0410-b5e6-96231b3b80d8
It is no longer necessary to opt out of pretty stack traces.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193973 91177308-0d34-0410-b5e6-96231b3b80d8