fix get_version for old H3C Quidway Router AR18-20
CLI out:
Copyright Notice: All rights reserved (Oct 25 2005). Without the owner's prior written consent, no decompiling nor reverse-engineering shall be allowed. Huawei-3Com Versatile Routing Platform Software VRP(R) software, Version 3.30, Release RT-0015 Copyright (c) 2003-2005 Hangzhou Huawei-3Com Tech. Co.,Ltd. All rights reserved. Copyright (c) 2000-2003 Huawei Tech. Co.,Ltd. All rights reserved. Quidway Series Router AR18-20 uptime is 2 weeks, 0 day, 2 hours, 47 minutes
CPU type: PowerPC 859DSL 80MHz 64M bytes SDRAM Memory 8M bytes Flash Memory 0K bytes NvRAM Memory Pcb Version:5.0 Logic Version:4.0 BootROM Version:7.67 [SLOT 1] 1FE (Hardware)5.0, (Driver)1.0, (Cpld)4.0 [SLOT 2] 1ETH (Hardware)5.0, (Driver)1.0, (Cpld)4.0