[Bug libbacktrace/88745] Darwin lacks an implementation for libbacktrace

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88745

--- Comment #9 from Ian Lance Taylor <ian at airs dot com> ---
filetype.awk will be run on a program compiled by the target compiler, so it
should get the correct result.

I agree that the endianness shouldn't matter with regard to the code, although
of course filetype.awk needs to match both endiannesses.