Changes imported from Abseil "staging" branch:

  - 89d5b08eeb96f195151a340772148fe7ed0a18f6 Put the internal ABSL_PRETTY_FUNCTION API behind a visibi... by Matt Armstrong <marmstrong@google.com>

GitOrigin-RevId: 89d5b08eeb96f195151a340772148fe7ed0a18f6
Change-Id: I6588a15c09a53a43ff87847e593864b1468dd375

absl/base/BUILD.bazel

@@ -229,6 +229,7 @@ cc_library(
 cc_library(
     name = "pretty_function",
     hdrs = ["internal/pretty_function.h"],
+    visibility = ["//absl:__subpackages__"],
 )
 
 cc_library(