Cleanup some more syscall.O_* references while we're here. PiperOrigin-RevId: 208133460 Change-Id: I48db71a38f817e4f4673977eafcc0e3874eb9a25
PiperOrigin-RevId: 194583126 Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463