fix: Exclude error_packages from main build

kamilogorek · kamilogorek · commit 14871b2e270c · 2019-03-07T17:21:36.000+01:00
diff --git a/example/error_packages.go b/example/error_packages.go
@@ -1,3 +1,5 @@
+// +build errors_packages
+
 package main
 
 import (
