[gn build] Port 1f2b7ae

Author: llvmgnsyncbot

llvm/utils/gn/secondary/libcxx/include/BUILD.gn

@@ -568,11 +568,11 @@ if (current_toolchain == default_toolchain) {
       "__locale_dir/locale_base_api/bsd_locale_fallbacks.h",
       "__locale_dir/locale_base_api/fuchsia.h",
       "__locale_dir/locale_base_api/ibm.h",
-      "__locale_dir/locale_base_api/locale_guard.h",
       "__locale_dir/locale_base_api/musl.h",
       "__locale_dir/locale_base_api/newlib.h",
       "__locale_dir/locale_base_api/openbsd.h",
       "__locale_dir/locale_base_api/win32.h",
+      "__locale_dir/locale_guard.h",
       "__math/abs.h",
       "__math/copysign.h",
       "__math/error_functions.h",