*: add bazeldnf dependency

This adds https://github.com/rmohr/bazeldnf, a pure-Go RPM dependency
resolver. Requires a dummy import for proper Go dependency resolution.

Change-Id: I4d4e7716bfd7da7e3157f06dc1f1612c9e39c17e
Reviewed-on: https://review.monogon.dev/c/monogon/+/1028
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
Tested-by: Leopold Schabel <leo@monogon.tech>
diff --git a/BUILD b/BUILD
index a6e19d7..e3e5528 100644
--- a/BUILD
+++ b/BUILD
@@ -1,5 +1,6 @@
 load("@bazel_gazelle//:def.bzl", "gazelle")
 load("@io_bazel_rules_go//go:def.bzl", "go_path")
+load("@bazeldnf//:def.bzl", "bazeldnf")
 
 # gazelle:prefix source.monogon.dev
 # gazelle:go_naming_convention import
@@ -51,6 +52,9 @@
     toolchain_type = "@rules_python//python:toolchain_type",
 )
 
+# bazeldnf binary
+bazeldnf(name = "bazeldnf")
+
 # Shortcuts for top-level binaries/tools
 
 # Shortcut for kubectl when running through bazel run