release-lib.nix: set inHydra anyways, it might be useful some day

Changed files
+1
pkgs
top-level
+1
pkgs/top-level/release-lib.nix
···
allPackages = args: packageSet (args // {
config.allowUnfree = false;
config.allowTexliveBuilds = allowTexliveBuilds;
+
config.inHydra = true;
});
pkgs = pkgsFor "x86_64-linux";