Fix lseek64 for aarch64 ILP32

[Andreas Schwab]

Joseph Myers <joseph@codesourcery.com> writes:

> Is there an existing testcase in the glibc testsuite that would have 
> failed for this issue, given the AArch64 ILP32 patches without this extra 
> patch?

Yes, libio/bug-fseek.

Andreas.

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Andreas Schwab, SUSE Labs, schwab@suse.de
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