[gn build] Port 9474e09

Author: llvmgnsyncbot

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

@@ -653,6 +653,16 @@ if (current_toolchain == default_toolchain) {
       "__mutex/once_flag.h",
       "__mutex/tag_types.h",
       "__mutex/unique_lock.h",
+      "__new/align_val_t.h",
+      "__new/allocate.h",
+      "__new/destroying_delete_t.h",
+      "__new/exceptions.h",
+      "__new/global_new_delete.h",
+      "__new/interference_size.h",
+      "__new/launder.h",
+      "__new/new_handler.h",
+      "__new/nothrow_t.h",
+      "__new/placement_new_delete.h",
       "__node_handle",
       "__numeric/accumulate.h",
       "__numeric/adjacent_difference.h",