kallsyms: add API to extract kallsyms with strtok_r()

This will allow us to simplify some code, and provide an API in both
the lib and daemon to get symbols while sharing code.

lib/sp-kallsyms.h

@@ -0,0 +1,41 @@
+/* sp-kallsyms.h
+ *
+ * Copyright © 2018 Christian Hergert <chergert@redhat.com>
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SP_KALLSYMS_H
+#define SP_KALLSYMS_H
+
+#include <gio/gio.h>
+
+#include "sp-kallsyms.h"
+
+G_BEGIN_DECLS
+
+typedef struct _SpKallsyms SpKallsyms;
+
+SpKallsyms *sp_kallsyms_new  (void);
+gboolean    sp_kallsyms_next (SpKallsyms   *self,
+                              const gchar **name,
+                              guint64      *address,
+                              guint8       *type);
+void        sp_kallsyms_free (SpKallsyms   *self);
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC (SpKallsyms, sp_kallsyms_free)
+
+G_END_DECLS
+
+#endif /* SP_KALLSYMS_H */