CPlusPlus: Add missing type information for enum variables

Consider these two variable declarations:
  enum EX { EX1, EX2};
  EX ex;
  emum EY { EY1, EY2} ey;
The ex variable would correctly get assigned type EX, but the ey
variable would not have any type.
This is now fixed.

Task-number: QTCREATORBUG-7487
Change-Id: I3e09c5766fdb9e6baf3a8d7bc6f2fc581f2d824b
Reviewed-by: Cristian Adam <cristian.adam@qt.io>

src/libs/3rdparty/cplusplus/Bind.cpp

@@ -3176,6 +3176,7 @@ bool Bind::visit(EnumSpecifierAST *ast)
     }
 
     (void) switchScope(previousScope);
+    _type.setType(control()->namedType(this->name(ast->name)));
     return false;
 }