[llvm] [libc][bazel] Create libc_release_library for release configurations. (PR #130694)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> > Is this something that could also be provided by a CMake cache file?
> 
> Joseph, could you elaborate? Do you suggest taking the list of sources/headers required to build a particular set of targets from the cache file CMake constructs? That probably wouldn't work in the Bazel world, where the CMake is never executed.

I just mean if we have special release configurations if that's something we should export through CMake as well.

https://github.com/llvm/llvm-project/pull/130694