Add nss-certs

We at least need nss-certs for running guix system reconfigure
manually, so it's a good idea to have it.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

guix-installer-vm-system.scm

@@ -11,6 +11,7 @@
 (define-module (guix-installer-vm-system)
   #:use-module (gnu)
   #:use-module (gnu packages admin)
+  #:use-module (gnu packages certs)
   #:use-module (gnu packages dns)
   #:use-module (gnu packages linux)
   #:use-module (gnu packages ssh)
@@ -69,7 +70,8 @@
    (timezone "Europe/Paris")
    (packages (append (list first-boot-script
                            htop
-			   net-tools)
+                           net-tools
+                           nss-certs)
                      %base-packages))
    (services
     (append