[Bug libstdc++/65978] missing constexpr on std::forward_as_tuple and std::tie (LWG issues 2275 and 2301)

[rhalbersma at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65978

--- Comment #3 from rhalbersma <rhalbersma at gmail dot com> ---
Ping to get this merged into the upcoming 5.4.