m/{n,t}/installer: init

This adds partial implementation of the installer [1].

It needs to be integrated with the installer bundle to become
functional.

[1] https://github.com/monogon-dev/monogon/issues/44

Change-Id: I6223e50dc02bc1ad1a8d1351b556ecba43f30a2f
Reviewed-on: https://review.monogon.dev/c/monogon/+/408
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/metropolis/pkg/sysfs/BUILD.bazel b/metropolis/pkg/sysfs/BUILD.bazel
index e7de943..87fa937 100644
--- a/metropolis/pkg/sysfs/BUILD.bazel
+++ b/metropolis/pkg/sysfs/BUILD.bazel
@@ -2,7 +2,10 @@
 
 go_library(
     name = "go_default_library",
-    srcs = ["uevents.go"],
+    srcs = [
+        "block.go",
+        "uevents.go",
+    ],
     importpath = "source.monogon.dev/metropolis/pkg/sysfs",
     visibility = ["//metropolis:__subpackages__"],
 )