Let getIdentifierNamespaceForKind know about aliases and have it treat them just like namespace decls.

llvm-svn: 67963
diff --git a/clang/lib/AST/DeclBase.cpp b/clang/lib/AST/DeclBase.cpp
index 634c86e..bc7ac56 100644
--- a/clang/lib/AST/DeclBase.cpp
+++ b/clang/lib/AST/DeclBase.cpp
@@ -190,6 +190,7 @@
     case FunctionTemplate:
     case ClassTemplate:
     case TemplateTemplateParm:
+    case NamespaceAlias:
       return IDNS_Tag | IDNS_Ordinary;
     
     // Never have names.