File: (try to) give up reading on I/O error

Whether this works depends on the stream and demux behaviour. There may
be a better way to fix this.
(cherry picked from commit f7b081e5)

modules/access/file.c

@@ -245,6 +245,7 @@ static ssize_t Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
                 msg_Err (p_access, "read failed (%m)");
                 intf_UserFatal (p_access, false, _("File reading failed"),
                                 _("VLC could not read the file."));
+                p_access->info.b_eof = true;
                 return 0;
         }
     }