C++: Store lambda captures in the code model.

Done-with: Erik Verbruggen
Task-number: QTCREATORBUG-7968
Task-number: QTCREATORBUG-7949

Change-Id: I0cf727052d0a3536ed96ee894b18768c9538c213
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

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

@@ -4394,8 +4394,14 @@ protected:
 
 class CaptureAST: public AST
 {
+public:
+    unsigned amper_token;
+    NameAST *identifier;
+
 public:
     CaptureAST()
+        : amper_token(0)
+        , identifier(0)
     {}
 
     virtual CaptureAST *asCapture() { return this; }