Add O_TMPFILE constant
Add O_TMPFILE constant

philippkeller/libc,rust-lang/libc,anatol/libc,superriva/libc,cactorium/libc,rust-lang/libc,rust-lang-nursery/libc,philippkeller/libc,superriva/libc,superriva/libc,rust-lang/libc,mneumann/libc,mneumann/libc,mneumann/libc,cactorium/libc,rust-lang-nursery/libc,anatol/libc,philippkeller/libc,rust-lang-nursery/libc,anatol/libc,cactorium/libc