gin proto文件生成go文件报错：--go_out: protoc-gen-go: Plugin failed with status code 1 解决方法
执行命令：protoc --go_out=. param.proto 时，生成go文件报错，完整报错信息如下：
protoc-gen-go: program not found or is not executable
Please specify a program using absolute path or make sure the program is available...