Bug#1051393: libmsv: Please update the outdated config.guess and config.sub to recognize the LoongArch

[wuruilong]

Source: libmsv
Version: 1.1.1-4
Followup-For: Bug #1051393
X-Debbugs-Cc: wuruil...@loongson.cn

Dear Maintainer,

I have verified the attached patch in loongarch platform and it can be compiled 
successfully, please merge the attached patch.

wuruilong