Joran Dirk Greef 843c104fc9 Add io_uring syscalls to os.bits.linux.mips.SYS
As per lib/libc/musl/arch/mips/bits/syscall.h.in:

```c
```
2020-09-21 10:39:58 +02:00
..
2020-09-20 18:45:44 +02:00
2020-08-29 20:24:59 +03:00
2020-09-19 16:18:04 +02:00