[gn build] Port d344c38

Author: llvmgnsyncbot

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

@@ -1394,6 +1394,7 @@ if (current_toolchain == default_toolchain) {
       "__ranges/transform_view.h",
       "__ranges/view_interface.h",
       "__ranges/views.h",
+      "__ranges/zip_transform_view.h",
       "__ranges/zip_view.h",
       "__split_buffer",
       "__std_mbstate_t.h",