opae.io: include unistd.h

[pcolberg]

This is needed for pread() and pwrite(). The missing header became apparent due to a build failure with Python 3.13.0a1 which no longer included unistd.h itself, but that change has since been reverted.

Link: https://bugzilla.redhat.com/2247016

[coveralls]

Pull Request Test Coverage Report for Build 8147481371

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 64.688%

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Totals
Change from base Build 8041155286:	0.0%
Covered Lines:	15820
Relevant Lines:	24456

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💛 - Coveralls