Added patch from AC

- add missing includes "unistd.h" for compiling with gcc 4.7.0.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@5096 b45a01b8-16f6-495d-af2f-9b41ad6348cc

libretroshare/src/ft/ftcontroller.cc

@@ -59,6 +59,7 @@
 
 #include "serialiser/rsconfigitems.h"
 #include <stdio.h>
+#include <unistd.h>		/* for (u)sleep() */
 #include <sstream>
 
 /******

libretroshare/src/ft/ftextralist.cc

@@ -31,6 +31,7 @@
 #include "serialiser/rsconfigitems.h"
 #include "util/rsdir.h"
 #include <stdio.h>
+#include <unistd.h>		/* for (u)sleep() */
 
 /******
  * #define DEBUG_ELIST	1

libretroshare/src/ft/ftserver.cc

@@ -23,6 +23,8 @@
  *
  */
 
+#include <unistd.h>		/* for (u)sleep() */
+#include <iostream>
 #include <sstream>
 #include "util/rsdebug.h"
 #include "util/rsdir.h"
@@ -48,9 +50,6 @@ const int ftserverzone = 29539;
 
 #include "serialiser/rsserviceids.h"
 
-#include <iostream>
-#include <sstream>
-
 /***
  * #define SERVER_DEBUG 1
  * #define DEBUG_TICK   1