Deprecate g_thread_init()

Move the last few things that needed thread-safe initialisation to a
global ctor.

https://bugzilla.gnome.org/show_bug.cgi?id=660744

glib/glib-init.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright © 2011 Canonical Limited
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * licence, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ *
+ * Author: Ryan Lortie <desrt@desrt.ca>
+ */
+
+#ifndef __GLIB_INIT_H__
+#define __GLIB_INIT_H__
+
+#include "gmessages.h"
+
+G_GNUC_INTERNAL extern GLogLevelFlags g_log_always_fatal;
+G_GNUC_INTERNAL extern GLogLevelFlags g_log_msg_prefix;
+GLIB_VAR gboolean g_mem_gc_friendly;
+
+#ifdef G_OS_WIN32
+#include <windows.h>
+
+G_GNUC_INTERNAL void g_thread_win32_init (void);
+G_GNUC_INTERNAL extern HMODULE glib_dll;
+#endif
+
+#endif /* __GLIB_INIT_H__ */