Fix GN visibility for a few targets that are compiled by default in a GN build.

build/config/sanitizers/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Contains the dependencies needed for asan to link into executables and
 # shared_libraries. Unconditionally depend upon this target as it is empty if
 # |is_asan| is false.
 group("deps") {
   if (is_asan) {
     public_configs = [ ":sanitizer_options_link_helper" ]
     deps = [
       ":options_sources",
     ]
   }
 }
 
 config("sanitizer_options_link_helper") {
   ldflags = [
     "-Wl,-u_sanitizer_options_link_helper",
     "-fsanitize=address",
   ]
 }
 
 source_set("options_sources") {
-  visibility = [ ":deps" ]
+  visibility = [
+    ":deps",
+    "//:gn_visibility",
+  ]
   sources = [
     "//build/sanitizers/sanitizer_options.cc",
   ]
 
   if (is_tsan) {
     sources += [ "//build/sanitizers/tsan_suppressions.cc" ]
   }
 }