signals: reduce multiple includes for sigc++/bind.h

Origin commit data
------------------
Commit: e4d0abc7dc
Author: Thilo Graf <dbt@novatux.de>
Date: 2017-02-06 (Mon, 06 Feb 2017)

src/gui/components/cc_item_text.cpp

@@ -35,6 +35,7 @@
 #include <fstream>
 #include <errno.h>
 #include <system/debug.h>
+
 using namespace std;
 
 //sub class CComponentsText from CComponentsItem