Split off OpenBSD code into a separate implementation

Move OpenBSD code into its own sysdeps directory. The changes from
bsd/ were becoming to hard to maintain as a #ifdef tree. This is
what's currently being distributed as part of OpenBSD ports.

sysdeps/openbsd/procaffinity.c

@@ -0,0 +1,27 @@
+/*
+ * $OpenBSD: procaffinity.c,v 1.1 2009/10/16 10:56:04 jasper Exp $
+ * procaffinity stub.
+ */
+
+#include <config.h>
+#include <glibtop/procaffinity.h>
+#include <glibtop/error.h>
+
+
+void
+_glibtop_init_proc_affinity_s(glibtop *server)
+{
+  server->sysdeps.proc_affinity =
+    (1 << GLIBTOP_PROC_AFFINITY_NUMBER) |
+    (1 << GLIBTOP_PROC_AFFINITY_ALL);
+
+}
+
+
+guint16 *
+glibtop_get_proc_affinity_s(glibtop *server, glibtop_proc_affinity *buf, pid_t pid)
+{
+  memset(buf, 0, sizeof *buf);
+
+  return NULL;
+}