lib/crash.cpp: addr2line: fcntl calls in pipe initializations fixed.

[DoctorNoobingstoneIPresume]

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[fruffy]

Should we merge this? What is the reason for this change?

[apinski-cavium]

Should we merge this? What is the reason for this change?
The fix looks correct to me. we using F_SETFD and oring in FD_CLOEXEC so that should be used with F_GETFD instead of the current F_GETFL which seems wrong. FD flags vs FD status flags really.
See https://man7.org/linux/man-pages/man2/fcntl.2.html .