Move bazel apple tests into a separate package.

--
MOS_MIGRATED_REVID=135686367

BUILD

diff --git a/BUILD b/BUILD
index 92b65ec..3401a32 100644
--- a/BUILD
+++ b/BUILD
@@ -14,7 +14,7 @@
     name = "workspace-file",
     srcs = [":WORKSPACE"],
     visibility = [
-        "//src/test/shell/bazel:__pkg__",
+        "//src/test/shell/bazel:__subpackages__",
         "//tools/cpp/test:__pkg__",
     ],
 )