[Emulator] Not able to create SysnoMap for Multi Arch using Syscalls::arch::Sysno

Sample Code

```
let mut map = SysnoMap:: i32>::new();
let sys_no = syscalls::x86::Sysno::from(0x10);
map.insert(sys_no, || 1);
```

Error: ```expected enum `syscalls::Sysno`, found enum `syscalls::x86::Sysno```

Start by reading the SysnoMap API and the arch-specific Sysno definitions referenced in the sample. Reproduce the type mismatch with the multi-architecture example, then determine the intended way for SysnoMap to accept architecture-specific syscall numbers. Done means the sample can create and populate a multi-architecture map without the enum mismatch.

Written by the indexing model from the issue text.