The bitcode reader looks specifically for `__DATA, __objc_catlist` as a
section name. However, SVN r304661 removed the spaces (the two names
are functionally equivalent but do not compare equally
lexicographically). This causes compatibility issues. Add an
auto-upgrade path for removing the spaces as well as use the new name in
the LTO plugin.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315086 91177308-0d34-0410-b5e6-96231b3b80d8
