devel/cdecl: upgrade 11.2->11.4

ChangeLog:
11.3:
Added explicit-ecsu option
Both an --explicit-csu/-S command-line and explicit-ecsu set option have been added that set which type keywords enum, class, struct, or union, are included explicitly in C++ declarations. The default is struct and
union only, so:

c++decl> declare ps as pointer to struct S
struct S *ps;
c++decl> declare pt as pointer to class T
T *pt;
Fixed nested array declaration
Explaining a declaration like:

explain int (a)[4]
is now fixed.

11.4:
_Atomic(T) in C++23
Now supporting the _Atomic(T) macro in C++23.

Fixed pointer to a typedef of void
Declarations like:

typedef void V
explain V *p
are now fixed.

Allow declarations using unknown scoped type names
Previously, cdecl complained about things like:

cdecl> define S as struct S
cdecl> explain S::T x

^

19: error: "T": unknown name
Now, it just assumes the T is a type:

declare x as T of structure S
cvr-qualified _Atomic
const-volatile-restrict-qualified _Atomic types are now correctly forbidden.