os-specific/darwin/setfile: drop the "unfree" license

Setfile is included by other derivation, which in turns makes them unfree, too.
This causes plenty of evaluation errors on Hydra, i.e.:

at `haskellPackages_ghc763_profiling.wx.x86_64-darwin' [nixpkgs = ..., officialRelease = false]:
user-thrown exception: package ‘setfile’ has an unfree license, refusing to evaluate

Now, it's true that "setfile" is unfree, but this doesn't affect us: our
derivation doesn't include the actual binary -- it just contains a symlink to
"/usr/bin/SetFile". Arguably, our setfile derivation is free and we can
re-distribute it.

-2
-2
pkgs/os-specific/darwin/setfile/default.nix
··· 20 meta = with stdenv.lib; { 21 description = "Set attributes of files and directories"; 22 homepage = "http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/setfile.1.html"; 23 - license = licenses.unfree; 24 maintainers = with maintainers; [ lovek323 ]; 25 platforms = platforms.darwin; 26 ··· 32 ''; 33 }; 34 } 35 -
··· 20 meta = with stdenv.lib; { 21 description = "Set attributes of files and directories"; 22 homepage = "http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man1/setfile.1.html"; 23 maintainers = with maintainers; [ lovek323 ]; 24 platforms = platforms.darwin; 25 ··· 31 ''; 32 }; 33 }