go/statusz: factor out load avg to separate file
diff --git a/go/statusz/BUILD.bazel b/go/statusz/BUILD.bazel
index 951adff..f051d72 100644
--- a/go/statusz/BUILD.bazel
+++ b/go/statusz/BUILD.bazel
@@ -2,7 +2,10 @@
 
 go_library(
     name = "go_default_library",
-    srcs = ["statusz.go"],
+    srcs = [
+        "load.go",
+        "statusz.go",
+    ],
     importpath = "code.hackerspace.pl/hscloud/go/statusz",
     visibility = ["//visibility:public"],
     deps = [