RFA: Remove support for TARGET_SWITCHES and TARGET_OPTIONS

[Paolo Bonzini]

Richard Sandiford wrote:
> Following on from:
> 
>     http://gcc.gnu.org/ml/gcc-patches/2005-05/msg02594.html
>     http://gcc.gnu.org/ml/gcc-patches/2005-05/msg02686.html
>     http://gcc.gnu.org/ml/gcc-patches/2005-05/msg02687.html
> 
> this patch removes support for TARGET_SWITCHES and TARGET_OPTIONS,
> and poisons those macros in system.h.

Not yet approved, but still, thank you very much!

Paolo