[PATCH, AVR] Add support for new AVR device ATmega32U4

[Anatoly Sokolov]

Hi.

>  2008-06-16  Eric B. Weddington  <eric.weddington@atmel.com>
>
> * gcc/config/avr/avr.c (avr_mcu_t): Add atmega32u4.
> * gcc/config/avr/avr.h (LINK_SPEC, CRT_BINUTILS_SPECS):
> Likewise. 
> * gcc/config/avr/t-avr (MULTILIB_MATCHES): Likewise. 

Committed.

Anatoly.