[gn] port 04a75f5

Author: nico

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

@@ -32,6 +32,7 @@ if (current_toolchain == default_toolchain) {
       "_LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION=",
       "_LIBCPP_HAS_NO_RANDOM_DEVICE=",
       "_LIBCPP_HAS_NO_LOCALIZATION=",
+      "_LIBCPP_HAS_NO_UNICODE=",
       "_LIBCPP_HAS_NO_WIDE_CHARACTERS=",
       "_LIBCPP_HAS_NO_STD_MODULES=",
       "_LIBCPP_INSTRUMENTED_WITH_ASAN=",