utils/ssh: Fix paramiko streams

Ensure that we use the input stream for reading.

devlib/utils/ssh.py

@@ -691,11 +691,11 @@ class SshConnection(SshConnectionBase):
                 w = os.fdopen(w, 'wb')
             # Turn a file descriptor into a file-like object
             elif isinstance(stream_out, int) and stream_out >= 0:
-                r = os.fdopen(stream_out, 'rb')
+                r = os.fdopen(stream_in, 'rb')
                 w = os.fdopen(stream_out, 'wb')
             # file-like object
             else:
-                r = stream_out
+                r = stream_in
                 w = stream_out
 
             return (r, w)