Fetching https://dl-ssl.google.com/android/repository/addons_list-2.xml
Failed to fetch URL https://dl-ssl.google.com/android/repository/addons_list-2.xml, reason: peer not authenticated
Fetched Add-ons List successfully
Fetching URL: https://dl-ssl.google.com/android/repository/repository-7.xml
Failed to fetch URL https://dl-ssl.google.com/android/repository/repository-7.xml, reason: SSLPeerUnverified peer not authenticated
Done loading packages.
有办法了，网上搜“Android sdk 镜像”，填入代理地址即可 例如 HTTP Proxy server：mirrors.neusoft.edu.cn HTTP Proxy Por：80
Other solutions：
https://code.google.com/p/goagent/issues/detail?id=15053