update development environment

devenv/el/7/Vagrantfile

@@ -0,0 +1,15 @@
+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# All Vagrant configuration is done below. The "2" in Vagrant.configure
+# configures the configuration version (we support older styles for
+# backwards compatibility). Please don't change it unless you know what
+# you're doing.
+Vagrant.configure("2") do |config|
+  config.vm.box = "centos/7"
+
+  config.vm.provision "shell", inline: <<-SHELL
+    yum install -y epel-release elrepo-release centos-release-scl
+    yum install -y kernel-lt kernel-lt-headers @development golang bpftool
+  SHELL
+end