[llvm] [libc][bazel] Adds missing targets for double MPFR tests (PR #226822)

[Sachin 🗲 via llvm-commits]

s4chinjha wrote:

> > ⚠️ We detected that you are using a GitHub private e-mail address to contribute to the repo. Please turn off [Keep my email addresses private](https://github.com/settings/emails) setting in your account. See [LLVM Developer Policy](https://llvm.org/docs/DeveloperPolicy.html#email-addresses) and [LLVM Discourse](https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it) for more information.
> 
> @s4chinjha I think this is somehow repeated. avoid changing this setting

yes, i haven't changed this setting. earlier i hadn't updated my email in git, which was causing this warning. i've fixed that now, so my github email setting is still untouched.

https://github.com/llvm/llvm-project/pull/226822