ObjectiveC migrator: Add more options one for each
kind of migration. // rdar://15003157



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191858 91177308-0d34-0410-b5e6-96231b3b80d8
ObjectiveC migrator: Add individual options and
enable them for distinct feature migration.
// rdar://15003157


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191863 91177308-0d34-0410-b5e6-96231b3b80d8