[patch,avr] Fix PR57631: Check ISR's asm name rather than C name

[Denis Chertykov]

2013/7/10 Georg-Johann Lay <avr@gjlay.de>:
> This change has been proposed so that the sanity checking of ISR
> (signal,interrupt) functions tests the asm function name if available, not the
> C name.
>
> Okay to apply?
>
> Johann
>
> gcc/
>         PR target/57631
>         * config/avr/avr.c (avr_set_current_function): Sanity-check signal
>         name seen by assembler/linker rather if available.
>
> gcc/testsuite/
>         PR target/57631
>         * gcc.target/avr/torture/pr57631.c: New test.

Approved.

Denis.