[Bug target/113312] Update __attribute__((interrupt)) for Intel FRED

[hpa at zytor dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113312

--- Comment #1 from H. Peter Anvin <hpa at zytor dot com> ---
This is actually a specific use case of the feature requested in bug 103503.