strip with mismatched machines

[Paul Edwards]

I used gcc on an x64 system to create a loongarch64 target.

So they are still x64 executables, they just do something unusual.

But that didn't occur to me at the time, and I attempted to use
the loongarch64 strip on the new x64 executables.

I have qemu installed, so it seamlessly ran.

However, the new executables (xgcc renamed to gcc etc)
were deemed corrupt and wouldn't run.

At the time I just thought "my bad" and moved on, but it
occurred to me that maybe strip should check that it is
being run on the right ELF type.

I can provide samples if required, but there is no point if
it is simply deemed "user error" and "bad luck", which is
fine. I just thought I'd report it in case it was considered
to be a bug.

Thanks. Paul.