安装编译所需依赖包

编译Open vSwitch组件之前，必须进行编译依赖的安装。

sudo yum install -y automake cmake patch numactl numactl-devel kernel-devel libevent glib2 glib2-devel libtool openssl-devel selinux-policy-devel autoconf python-sphinx unbound-devel logrotate