Tweak @hedron_compile_commands//:bzl_srcs_for_stardoc per #142

Author: cpsauer

BUILD

@@ -11,7 +11,7 @@ refresh_compile_commands(
 
 # Stardoc users only: Depend on "@hedron_compile_commands//:bzl_srcs_for_stardoc" as needed.
 # Why? Stardoc requires all loaded files to be listed as deps; without this we'd prevent users from running Stardoc on their code when they load from this tool in, e.g., their own workspace.bzl or wrapping macros.
-filegroup(name = "bzl_srcs_for_stardoc", srcs = glob(["**/*.bzl"]), visibility = ["//visibility:public"])
+filegroup(name = "bzl_srcs_for_stardoc", srcs = glob(["**/*.bzl"]) + ["@bazel_tools//:bzl_srcs"], visibility = ["//visibility:public"])