[Tc] 请求评审LTS的LLVM升级到8.0.1

当前lts llvm为7.0.0，为2018年9月19日发布版本，较为老旧，希望能够升级到2019年7月19日的8.0.1的版本，到最新版本的话跨度较大，且差异也较多，故而选择中间版本8.0.1。

沈洋洋 庞加莱实验室 [2012实验室] Tel : +86 18958088172 Email : shenyangyang4@huawei.commailto:shenyangyang4@huawei.com [cid:image001.png@01D6076C.F37B6120]

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