Some packages like `bazel-watcher` seems to have broken after
9dc3b14859
Where `xpc` was removed from `IOSurface` dependencies.
`CoreServices` were pulling `xpc` via `IOSurface` and so `Security`
didn't break. Now explicit dependency on `xpc` is needed to avoid
errors like
```
In file included from __main__/external/com_github_fsnotify_fsevents/go_1_10_after.go:6:
In file included from /nix/store/2k3mdkl9jvwwzpbfaqhchfiqjq64046b-apple-framework-CoreServices-11.0.0/Library/Frameworks/CoreServices.framework/Headers/CoreServices.h:39:
In file included from /nix/store/2k3mdkl9jvwwzpbfaqhchfiqjq64046b-apple-framework-CoreServices-11.0.0/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/LaunchServices.h:23:
In file included from /nix/store/2k3mdkl9jvwwzpbfaqhchfiqjq64046b-apple-framework-CoreServices-11.0.0/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Headers/IconsCore.h:23:
In file included from /nix/store/2k3mdkl9jvwwzpbfaqhchfiqjq64046b-apple-framework-CoreServices-11.0.0/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/OSServices.h:29:
In file included from /nix/store/2k3mdkl9jvwwzpbfaqhchfiqjq64046b-apple-framework-CoreServices-11.0.0/Library/Frameworks/CoreServices.framework/Frameworks/OSServices.framework/Headers/CSIdentity.h:43:
In file included from /nix/store/dg51rm1bapffbqvn46bh43km4dhcsy9p-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Headers/Security.h:87:
/nix/store/dg51rm1bapffbqvn46bh43km4dhcsy9p-apple-framework-Security-11.0.0/Library/Frameworks/Security.framework/Headers/SecCode.h:35:10: fatal error: 'xpc/xpc.h' file not found
^~~~~~~~~~~
```
Should help with https://github.com/NixOS/nixpkgs/pull/203519