gradle 4.7发布

gradle中国加速源
https://downloads.gradle.net/distributions/gradle-4.7-bin.zip
坚果云
https://www.jianguoyun.com/p/DVwvi34Q6aLoBhjZ2U4
验证您的安装
打开控制台（或Windows命令提示符）并运行gradle -v以运行gradle并显示版本，例如：
$ gradle -v
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Gradle 4.7
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