Fix vagrant grub issue with ubuntu & virtualbox

Change-Id: I8ff952a02c9c51070c41bdca72fb4f7ed8a7c8ba
Signed-off-by: Matt Johnson <matjohn2@cisco.com>
diff --git a/build-root/vagrant/bootstrap.ubuntu1404.sh b/build-root/vagrant/bootstrap.ubuntu1404.sh
index 89cd4e8..1802301 100644
--- a/build-root/vagrant/bootstrap.ubuntu1404.sh
+++ b/build-root/vagrant/bootstrap.ubuntu1404.sh
@@ -1,3 +1,6 @@
+# Fix grub-pc on Virtualbox with Ubuntu
+export DEBIAN_FRONTEND=noninteractive
+
 # Standard update + upgrade dance
 apt-get update
 apt-get upgrade -y
@@ -7,7 +10,7 @@
 sudo update-alternatives --install /bin/sh sh /bin/bash 100
 
 # Install build tools
-apt-get install -y build-essential autoconf automake bison libssl-dev ccache libtool git dkms debhelper
+apt-get install -y build-essential autoconf automake bison libssl-dev ccache libtool git dkms debhelper emacs
 
 # Install other stuff
 # apt-get install -y qemu-kvm libvirt-bin ubuntu-vm-builder bridge-utils