Merge #104: generate_nmc_cert: Use external x509 package in parent.go

360369c generate_nmc_cert: Use external x509 package in parent.go (JeremyRand)

Pull request description:

  `parent.go` was accidentally not updated when `x509` moved to an external repo; this is breaking the Travis build.  This PR fixes that.

ACKs for commit 360369:

Tree-SHA512: d90deee1bfd9d8bdab7e33d48897508781c0d0b97b823e36a8142d80472dee2cf8d10bcfdcd92b4b6719d8db44d37bf0cd98ffdc41a11cd412db736b3e4a4d6d

generate_nmc_cert/parent.go

@@ -37,7 +37,7 @@ import (
 	//"strings"
 	"time"
 
-	"github.com/namecoin/ncdns/x509"
+	"github.com/namecoin/x509-signature-splice/x509"
 )
 
 //var (