[Chromecast] Only include all libstdc++/libgcc symbols in executable as needed

chromecast/BUILD.gn

Index: chromecast/BUILD.gn
diff --git a/chromecast/BUILD.gn b/chromecast/BUILD.gn
index 8e1c18e9b1ada95972901d72f36b892024d8a274..f87341527659446a89829452d7fd17fb4f2147f7 100644
--- a/chromecast/BUILD.gn
+++ b/chromecast/BUILD.gn
@@ -223,6 +223,10 @@ executable("cast_shell") {
   if (chromecast_branding != "public") {
     deps += [ "//chromecast/internal:cast_shell_internal" ]
   }
+
+  # whole archiving libgcc.a and libstdc++ is needed if dynamic share libs are
+  # used, see b/25566835
+  configs += [ "//build/config/chromecast:executable_whole_archive_config" ]
 }
 
 repack("cast_shell_pak") {