R: 3.5.3 -> 3.6.0
The patch is necessary for the test suite to pass without errors. The
fix has already been made upstream but didn't make it into the 3.6.0
release.
Closes https://github.com/NixOS/nixpkgs/pull/60273.
authored by Alex Branham and committed by Peter Simons 4264ad4c 83886b3d