Fix semantic of C++ 11 inline namespaces.

Add the declaring `inline' namespace to the `using list' of its
enclosing namespace symbol. This should be enough to ensure
the correct visibility of the symbols declarated in the inlined
namespace.

Change-Id: Id4de74577c498fe439a49709a306ef0deb145988
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

src/libs/cplusplus/LookupContext.cpp

@@ -817,7 +817,11 @@ bool CreateBindings::visit(Namespace *ns)
     for (unsigned i = 0; i < ns->memberCount(); ++i)
         process(ns->memberAt(i));
 
+    if (ns->isInline() && previous)
+        previous->addUsing(_currentClassOrNamespace);
+
     _currentClassOrNamespace = previous;
+
     return false;
 }