LibC: Add stub for res_query

Userland/Libraries/LibC/CMakeLists.txt

@@ -28,6 +28,7 @@ set(LIBC_SOURCES
     pwd.cpp
     qsort.cpp
     regex.cpp
+    resolv.cpp
     scanf.cpp
     sched.cpp
     serenity.cpp

Userland/Libraries/LibC/resolv.cpp

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/Format.h>
+#include <resolv.h>
+
+extern "C" {
+
+int res_query(char const*, int, int, unsigned char*, int)
+{
+    dbgln("FIXME: Implement res_query()");
+    return 0;
+}
+}

Userland/Libraries/LibC/resolv.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+int res_query(const char* dname, int class_, int type, unsigned char* answer, int anslen);
+
+__END_DECLS