devel/cdecl: update to 11.11

ChangeLog:
using with attributes
Now supporting using with attributes:

c++decl> explain using Int maybe_unused = int
declare Int as maybe unused type int
Declare types with using
In C++11 and later, types are now declared with using instead of typedef
by default.

using declarations
New --no-using/-u command-line option and using set option that control
whether types are declared with using instead of typedef in C++11 and
later:

c++decl> declare pint as type pointer to int
using pint = int*;
c++decl> set nousing
c++decl> declare pint as type pointer to int
typedef int *pint;
More K&R C types
The types caaddr_t and daddr_t were added; jmp_buf was moved from C89.