Update visibility.

PiperOrigin-RevId: 876223758
Change-Id: I7c47dbff344c5fd51d51c3254cb553496693d09b

absl/base/BUILD.bazel

diff --git a/absl/base/BUILD.bazel b/absl/base/BUILD.bazel
index 4fcb4f1..c6e4be6 100644
--- a/absl/base/BUILD.bazel
+++ b/absl/base/BUILD.bazel
@@ -157,6 +157,7 @@
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     visibility = [
+        "//absl:friends",
         "//absl/base:__pkg__",
     ],
     deps = [