danger: current GCC makes a hash out of initfini.c

[Roland McGrath]

The initfini.c plan has always been fragile by its nature.  If it works, it
works.  If forcing -O1 for the file helps, there's no reason not to do
that.  Several other platforms have given up on massaging GCC output for
this and supply sysdeps/CPU/elf/initfini.c with the asm directly.  If you
have to do that for mips to cope with newer GCC, c'est la vie.