[llvm] [bazel][libc] Add layering deps (PR #210380)

[Jordan Rupprecht via llvm-commits]

https://github.com/rupprecht created https://github.com/llvm/llvm-project/pull/210380

Not sure why CI didn't catch it, but c5837b469c6d6f35eb0822cd9ebd7c2aa7e2ab75 adds some targets that are broken when layering checks are enabled.

>From 02b16d0a2b5aff704a09c176cc8746ba1fda5016 Mon Sep 17 00:00:00 2001
From: Jordan Rupprecht <rupprecht at google.com>
Date: Fri, 17 Jul 2026 10:12:24 -0700
Subject: [PATCH] Add layering deps

---
 .../llvm-project-overlay/libc/test/src/sys/socket/BUILD.bazel    | 1 +
 1 file changed, 1 insertion(+)

diff --git a/utils/bazel/llvm-project-overlay/libc/test/src/sys/socket/BUILD.bazel b/utils/bazel/llvm-project-overlay/libc/test/src/sys/socket/BUILD.bazel
index 707c438556bcd..f3765376b3aec 100644
--- a/utils/bazel/llvm-project-overlay/libc/test/src/sys/socket/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/libc/test/src/sys/socket/BUILD.bazel
@@ -27,6 +27,7 @@ libc_test_library(
         "//libc:types_size_t",
         "//libc:types_socklen_t",
         "//libc:types_struct_sockaddr_un",
+        "//libc/test/UnitTest:LibcUnitTest",
     ],
 )