[Bug c/89968] attribute packed fails to reduce char vector member alignment

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89968

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
One problem is the order of the attributes applying here. vector_size applies
after all the others as that is the order in the program.