[gn build] Port b793280

Author: llvmgnsyncbot

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

@@ -469,7 +469,6 @@ if (current_toolchain == default_toolchain) {
       "__functional/reference_wrapper.h",
       "__functional/unary_function.h",
       "__functional/unary_negate.h",
-      "__functional/unwrap_ref.h",
       "__functional/weak_result_type.h",
       "__fwd/array.h",
       "__fwd/fstream.h",
@@ -863,6 +862,7 @@ if (current_toolchain == default_toolchain) {
       "__type_traits/type_identity.h",
       "__type_traits/type_list.h",
       "__type_traits/underlying_type.h",
+      "__type_traits/unwrap_ref.h",
       "__type_traits/void_t.h",
       "__undef_macros",
       "__utility/as_const.h",