Fixes build with glibc-2.12

http://bugs.gentoo.org/333515
https://bugs.launchpad.net/ubuntu/+source/idesk/+bug/592602

Patch written by Bhavani Shankar <bhavi@ubuntu.com>
--- idesk-0.7.5/src/DesktopConfig.cpp
+++ idesk-0.7.5/src/DesktopConfig.cpp
@@ -24,6 +24,8 @@
 
 #include "DesktopConfig.h"
 #include "Util.h"
+#include <sys/types.h>    // For stat()
+#include <sys/stat.h>     // For stat()
 
 //the initilizer list just sets the program defaults for non-necessary options
 DesktopConfig::DesktopConfig(Database db, string ideskrcFile) :