Include iomanip.h because we need the |using std::hex| and |using std::dec| from it to build with libstdc++ 3.0. b=63604 r=cls@seawood.org

git-svn-id: svn://10.0.0.236/trunk@89289 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/xpcom/tests/TestObserverService.cpp

@@ -29,6 +29,7 @@
 #include "nsString.h"
 #include "prprf.h"
 #include <iostream.h>
+#include <iomanip.h>   // needed for libstdc++-v3
 #include "nsWeakReference.h"
 
 static nsIObserverService *anObserverService = NULL;