treewide: explicity load built-in rules

In Bazel 9 all autoloaded rules will be disabled. This prepares us for
that.

Change-Id: Ibaa4fa2e6b7095922a5699d2d5f3ae6c2cba3552
Reviewed-on: https://review.monogon.dev/c/monogon/+/3939
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/third_party/libpg_query/libpg_query.bzl b/third_party/libpg_query/libpg_query.bzl
index 1a2486b..c77c692 100644
--- a/third_party/libpg_query/libpg_query.bzl
+++ b/third_party/libpg_query/libpg_query.bzl
@@ -1,3 +1,5 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
 filegroup(
     name = "all",
     srcs = glob(["**"]),