x11/xdg-desktop-portal-hyprland: unbreak with libc++ 16 after 4ce3b4b71dcb

/usr/local/bin/ld: src/xdg-desktop-portal-hyprland.p/main.cpp.o: in function `unsigned int std::1::format_spec::substitute_arg_id[abi:v160006]<std::1::basic_format_context<std::1::back_insert_iterator<std::1::format::output_buffer<char> >, char> >(std::1::basic_format_arg<std::1::basic_format_context<std::1::back_insert_iterator<std::1::format::output_buffer<char> >, char> >)::{lambda(auto:1)#1}::operator()<std::1::monostate>(std::1::monostate) const [clone .constprop.0]':
main.cpp:(.text.unlikely+0x23): undefined reference to `vtable for std::1::format_error'
/usr/local/bin/ld: main.cpp:(.text.unlikely+0x28): undefined reference to `std::1::format_error::~format_error()'
/usr/local/bin/ld: main.cpp:(.text.unlikely+0x2d): undefined reference to `typeinfo for std::__1::format_error'
[...]

Reported by: pkg-fallout