[lld] [LLD][COFF] Allow symbols with empty chunks to have no associated output section (PR #149523)

[Jacek Caban via llvm-commits]

cjacek wrote:

This issue was reported to cause problems when building Wine:
https://github.com/mstorsjo/llvm-mingw/commit/ae0357758c2b3e93209fe89931b7f358def308e9#commitcomment-162336778

In that case, it involved the recently introduced `__data_start__` symbol, but the problem isn't specific to that symbol. The test included in this MR demonstrates that the issue can occur more generally.


https://github.com/llvm/llvm-project/pull/149523