fix(sgx): reference that is immediately dereferenced by the compiler

```
error: this expression borrows a reference (`&[u8]`) that is immediately dereferenced by the compiler
Error:    --> src/handler.rs:470:53
    |
470 |         let (c, shim_nonce_ptr) = c.copy_from_slice(&report_bytes).or(Err(libc::EMSGSIZE))?;
    |                                                     ^^^^^^^^^^^^^ help: change this to: `report_bytes`
    |
```

Signed-off-by: Harald Hoyer <harald@redhat.com>

Author: haraldh

internal/shim-sgx/src/handler.rs

@@ -467,7 +467,7 @@ impl<'a> EnarxSyscallHandler for Handler<'a> {
         };
 
         let c = self.new_cursor();
-        let (c, shim_nonce_ptr) = c.copy_from_slice(&report_bytes).or(Err(libc::EMSGSIZE))?;
+        let (c, shim_nonce_ptr) = c.copy_from_slice(report_bytes).or(Err(libc::EMSGSIZE))?;
         let (_, shim_buf_ptr) = c.alloc::<u8>(buf_len).or(Err(libc::EMSGSIZE))?;
         let req = request!(SYS_ENARX_GETATT => shim_nonce_ptr.as_ptr(), report_bytes.len(), shim_buf_ptr.as_ptr(), buf_len);
         let result = unsafe { self.proxy(req)? };