[Chromecast] Include all stdlibc++/libgcc symbols in cast_shell.

build/config/BUILDCONFIG.gn

 # Copyright (c) 2013 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.
 
 # =============================================================================
 # PLATFORM SELECTION
 # =============================================================================
 #
 # There are two main things to set: "os" and "cpu". The "toolchain" is the name
 # of the GN thing that encodes combinations of these things.
@@ skipping 489 matching lines @@
 # Executable defaults.
 _executable_configs =
     _native_compiler_configs + [ "//build/config:default_libs" ]
 if (is_win) {
   _executable_configs += _windows_linker_configs
 } else if (is_mac) {
   _executable_configs += [
     "//build/config/mac:mac_dynamic_flags",
     "//build/config/mac:mac_executable_flags",
   ]
-} else if (is_linux || is_android) {
+} else if (is_linux || is_android || is_chromecast) {
   _executable_configs += [ "//build/config/gcc:executable_ldconfig" ]
   if (is_android) {
     _executable_configs += [ "//build/config/android:executable_config" ]
+  } else if (is_chromecast) {
+    _executable_configs += [ "//build/config/chromecast:executable_config" ]
   }
 }
 set_defaults("executable") {
   configs = _executable_configs
 }
 
 # Static library defaults.
 set_defaults("static_library") {
   configs = _native_compiler_configs
 }
@@ skipping 57 matching lines @@
     forward_variables_from(invoker, "*")
 
     # All shared libraries must have the sanitizer deps to properly link in
     # asan mode (this target will be empty in other cases).
     if (!defined(deps)) {
       deps = []
     }
     deps += [ "//build/config/sanitizers:deps" ]
   }
 }