node/core: add sysctls

Change-Id: I47b0d639a62f73f134430c5164a35eef2b5622d7
Reviewed-on: https://review.monogon.dev/c/monogon/+/2273
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/metropolis/pkg/sysctl/BUILD.bazel b/metropolis/pkg/sysctl/BUILD.bazel
new file mode 100644
index 0000000..a945a03
--- /dev/null
+++ b/metropolis/pkg/sysctl/BUILD.bazel
@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "sysctl",
+    srcs = ["options.go"],
+    importpath = "source.monogon.dev/metropolis/pkg/sysctl",
+    visibility = ["//visibility:public"],
+)