hw/xwin: Add missing include xwin-config.h to winglobals.h

winglobals.h checks if RELOCATE_PROJECTROOT is defined to see if a declaration
of g_fLogFileChanged is needed, so must include xwin-config.h

Signed-off-by: Ryan Pavlik <rpavlik@iastate.edu>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Colin Harrison <colin.harrison@virgin.net>

hw/xwin/winglobals.h

@@ -26,6 +26,10 @@
 #ifndef WINGLOBALS_H
 #define WINGLOBALS_H
 
+#ifdef HAVE_XWIN_CONFIG_H
+#include <xwin-config.h>
+#endif
+
 /*
  * References to external symbols
  */