treewide: add missing lib inputs

This fixes hopefully all remaining missing lib inputs, likely introduced
as a regression by our recent treewide switch from stdenv.lib to lib.
These instances are all I could find using nix-instantiate --parse using
the following command:

    find "$NIXPKGS" -name '*.nix' \
      -and ! -path "$NIXPKGS/pkgs/development/interpreters/python/cpython/docs/template.nix" \
      -and ! -path '$NIXPKGS/.git/**' \
      -print0 | xargs -0 nix-instantiate --parse >/dev/null

pkgs/development/tools/continuous-integration/buildkite-agent/generic.nix

@@ -1,4 +1,4 @@
-{ buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
+{ lib, buildGoPackage, makeWrapper, coreutils, git, openssh, bash, gnused, gnugrep
 , src, version, hasBootstrapScript, postPatch ? ""
 , ... }:
 let