[avr-gcc-list] builtins-error.c test fails for avr

[Sivanupandi, Pitchumani]

Hi,

Test gcc.target/avr/torture/builtins-error.c is failed in gcc-4.9 and trunk for 
-Os -flto options.
This test expects error for compile time constant. Option flto delays the 
builtin expand 
(to link time??) and there is no error. Can this test be skipped for above 
option?

If -ffat-lto-objects option used then avr-gcc gives the error.

Regards,
Pitchumani