nginx: fix build by not attempting to use a patch

It failed since 3c6efec2c09, i.e. #4453.
Now it should "work" the same as before.

CC maintainers: @thoughtpolice & @7c6f434c.
ucommon: update

I couldn't reproduce the test failure with either version:
http://hydra.nixos.org/build/15982469/nixlog/1/tail-reload