[libcxx-commits] [libcxx] [libc++] Store the premerge runner images in the monorepo (PR #171443)

[Louis Dionne via libcxx-commits]

ldionne wrote:

Along with https://github.com/llvm/llvm-zorg/pull/670, this gives us a canonical place for storing the Docker image used by various pieces of libc++ infrastructure.

https://github.com/llvm/llvm-project/pull/171443