CPP11 — from_string issue

Summary: The latest C++ mapping (document orbos/98-05-08) defines the
Any::from_string type as

struct from_string {
from_string(char* s, ULong b, Boolean nocopy = FALSE) : val(s),
bound(b) {}
...
};

In ANSI C++, this disallows the following code:

any <<= Any::from_string("string literal");

This is because string literals in ANSI C++ are const char[], not char[].
Therefore, from_string should have an additional constructor to allow
insertion of a const char* as well.

Close as duplicate of 2453.