[gn] port 7ad7f8f

Author: nico

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

@@ -35,6 +35,7 @@ if (current_toolchain == default_toolchain) {
       "_LIBCPP_HAS_NO_UNICODE=",
       "_LIBCPP_HAS_NO_WIDE_CHARACTERS=",
       "_LIBCPP_HAS_NO_STD_MODULES=",
+      "_LIBCPP_HAS_NO_TERMINAL=",
       "_LIBCPP_INSTRUMENTED_WITH_ASAN=",
       "_LIBCPP_ABI_DEFINES=",
       "_LIBCPP_HARDENING_MODE_DEFAULT=_LIBCPP_HARDENING_MODE_NONE",