Add include guards for generated file app_version.h.

Change-Id: I3ad01e47d2a76159b1369330246b23ed03120597
Reviewed-on: http://codereview.qt-project.org/6361


Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/app/app_version.h.in

@@ -30,6 +30,9 @@
 **
 **************************************************************************/
 
+#ifndef APP_VERSION_H
+#define APP_VERSION_H
+
 namespace Core {
 namespace Constants {
 
@@ -66,3 +69,5 @@ const char * const IDE_REVISION_STR      = \"\";
 
 } // Constants
 } // Core
+
+#endif //APP_VERSION_H