[libc-commits] [libc] [libc] Provide empty definitions for `teardown_main_tls` symbols (PR #173412)

[Petr Hosek via libc-commits]

petrhosek wrote:

Superseded by https://github.com/llvm/llvm-project/pull/174373 and https://github.com/llvm/llvm-project/pull/174374 after offline discussion with @frobtech.

https://github.com/llvm/llvm-project/pull/173412