zkvm: fix references to os_str module

The `os_str` module has been moved to `sys`.

Author: SchmErik

library/std/src/sys/pal/zkvm/args.rs

@@ -1,6 +1,7 @@
 usesuper::{abi,WORD_SIZE};
 usecrate::ffi::OsString;
 usecrate::fmt;
+usecrate::sys::os_str;
 usecrate::sys_common::FromInner;
 
 pubstructArgs{
@@ -33,7 +34,7 @@ impl Args {
 // "os_str".
 let arg_bytes:&[u8] =
 unsafe{crate::slice::from_raw_parts(words.cast()as*constu8, arg_len)};
-OsString::from_inner(super::os_str::Buf{inner: arg_bytes.to_vec()})
+OsString::from_inner(os_str::Buf{inner: arg_bytes.to_vec()})
 }
 }
 

library/std/src/sys/pal/zkvm/os.rs

@@ -5,6 +5,7 @@ use crate::fmt;
 usecrate::io;
 usecrate::marker::PhantomData;
 usecrate::path::{self,PathBuf};
+usecrate::sys::os_str;
 usecrate::sys_common::FromInner;
 
 pubfnerrno() -> i32{
@@ -111,7 +112,7 @@ pub fn getenv(varname: &OsStr) -> Option<OsString> {
 // reimplement "os_str" instead of just using the generic unix
 // "os_str".
 let u8s:&[u8] = unsafe{crate::slice::from_raw_parts(words.cast()as*constu8, nbytes)};
-Some(OsString::from_inner(super::os_str::Buf{inner: u8s.to_vec()}))
+Some(OsString::from_inner(os_str::Buf{inner: u8s.to_vec()}))
 }
 
 pubfnsetenv(_:&OsStr, _:&OsStr) -> io::Result<()>{