Set visibility for available_externally globals. This is important for two reasons:

* llvm-link would complains about mismatched visibility
* If we produce a relocation with an available_externally, it is good to know that
it is hidden.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124633 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed