Fix visibility issue in absl/log/internal:flags

PiperOrigin-RevId: 916300899
Change-Id: I219afa7d0fd85e950a05e569cb151e414358b325

absl/log/internal/BUILD.bazel

diff --git a/absl/log/internal/BUILD.bazel b/absl/log/internal/BUILD.bazel
index 0344b56..6995b26 100644
--- a/absl/log/internal/BUILD.bazel
+++ b/absl/log/internal/BUILD.bazel
@@ -124,6 +124,7 @@
     linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
         ":internal_users",
+        "//absl:friends",
         "//absl/status:__pkg__",
     ],
     deps = [