[llvm] [libc][NFC] Fix missing dep in bazel (PR #73854)

[Guillaume Chatelet via llvm-commits]

gchatelet wrote:

> Patch #73469 added a dependency from __support/bit.h to __support/CPP/type_traits.h, but didn't add a dependency in the bazel. This caused downstream build failures. This patch fixes the missing dependency.

Thx for the fix @michaelrj-google! Unfortunately, layering-check upstream is weaker than the internal one so we can't easily detect these breakage. I usually try to also test the patch internally but it's more work and I didn't do it this time...

https://github.com/llvm/llvm-project/pull/73854