stub sysdep: add some missing files

https://bugzilla.gnome.org/show_bug.cgi?id=724196

sysdeps/stub/procaffinity.c

@@ -0,0 +1,35 @@
+/* Copyright (C) 2014 Ryan Lortie <desrt@desrt.ca>
+   This file is part of LibGTop 2.
+
+   LibGTop is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License,
+   or (at your option) any later version.
+
+   LibGTop is distributed in the hope that it will be useful, but WITHOUT
+   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+   for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with LibGTop; see the file COPYING. If not, write to the
+   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+*/
+
+#include <config.h>
+#include <glibtop/procaffinity.h>
+
+void
+_glibtop_init_proc_affinity_s(glibtop *server)
+{
+}
+
+guint16 *
+glibtop_get_proc_affinity_s(glibtop *server, glibtop_proc_affinity *buf, pid_t pid)
+{
+  memset(buf, 0, sizeof *buf);
+
+  return NULL;
+}
+