C++11: Parse alias declarations.

The parser no longer fails declarations like:
using Foo = std::vector<int>::iterator;

Change-Id: Ib3a552ebbe0147fa138db6448a52cdba8f9b9207
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/3rdparty/cplusplus/ASTPatternBuilder.h

@@ -577,6 +577,13 @@ public:
         return __ast;
     }
 
+    AliasDeclarationAST *AliasDeclaration(TypeIdAST *typeId = 0)
+    {
+        AliasDeclarationAST *__ast = new (&pool) AliasDeclarationAST;
+        __ast->typeId = typeId;
+        return __ast;
+    }
+
     ExpressionListParenAST *ExpressionListParen(ExpressionListAST *expression_list = 0)
     {
         ExpressionListParenAST *__ast = new (&pool) ExpressionListParenAST;