Bug on syscall error test for 64 bits apps

[Segher Boessenkool]

> And break kernel compile ... Hrm, that will not be fun

So fix the kernel.  Hey, all of this was triggered by a kernel
bug you found; if binutils would have worked correctly, you
would have trivially found this otherwise not-all-that-easy
to find, potentially devastating kernel bug.

:-)

Segher

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