add some C dependencies

this stresses the toolchain more.

test/BUILD

@@ -6,6 +6,10 @@ go_library(
     cgo = True,
     importpath = "github.com/motiejus/bazel-zig-cc/test",
     visibility = ["//visibility:private"],
+    deps = [
+        "@com_github_datadog_zstd//:go_default_library",
+        "@com_github_mattn_go_sqlite3//:go_default_library",
+    ],
 )
 
 go_binary(

test/hello.go

@@ -1,5 +1,10 @@
 package main
 
+import (
+	_ "github.com/DataDog/zstd"
+	_ "github.com/mattn/go-sqlite3"
+)
+
 // #include <stdio.h>
 // void helloworld() { printf("hello, world\n"); }
 import "C"