During typo correction, check for an exact match in an unimported module. If we
find one, then report the error as a missing import instead of as a typo.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@188821 91177308-0d34-0410-b5e6-96231b3b80d8
ObjectiveC migrator: More tweaking of heuristics
for an audited cf function to not include those
which are annotated by user.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@188823 91177308-0d34-0410-b5e6-96231b3b80d8