Proot doesn't work

## Version:

iSH: latest (build 70)

## Issue:

Since Apline apparently doesn't support `binfmt_misc` (yes, I'm trying to run an emulator inside an emulator), I tried [`proot`](https://pkgs.alpinelinux.org/package/edge/testing/x86/proot), but there are missing syscalls and a missing `/proc/self/cwd`:

```
# apk add proot
...installs from edge/testing...
# proot -R alpineARM
proot error: waitpid(): Invalid argument
proot warning: can't readlink '/proc/self/cwd': No such file or directory
talloc report on 'null_context' (total 99282 bytes in 46 blocks)
Tracee contains 99282 bytes in 45 blocks (ref 0) 0xf7ffd3b0
# dmesg
677 missing syscall 26
679 missing syscall 26
681 missing syscall 26
683 missing syscall 26
#
```