SDWebImage/WebP 安装免翻墙

修改配置文件

<!--路径:-->
/Users/houyukun/.cocoapods/repos/master/Specs/1/9/2/libwebp/1.1.0/libwebp.podspec.json

<!--修改-->
"git": "https://chromium.googlesource.com/webm/libwebp"为
"git": "https://github.com/webmproject/libwebp"