[Bug other/46770] Replace .ctors/.dtors with .init_array/.fini_array on targets supporting them

[marcelo at brs dot ind.br]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46770

--- Comment #106 from Marcelo Richter <marcelo at brs dot ind.br> ---
Update: init_priority not work across TUs.
It works to change constructor order in same CPP file.
Between .cpp files or between cpp and library, it not work.