fedora-cloud-base: Add which package back.

After removing grub2 the which package gets removed. Let's add it back
because it is generally useful and because it is needed for many vagrant
utilities to work.

fedora-cloud-base.ks

@@ -64,6 +64,9 @@ kernel-core
 # Need to pull in the udev subpackage
 systemd-udev
 
+# after move away from grub2 - let's add 'which' back
+which
+
 # rescue mode generally isn't useful in the cloud context
 -dracut-config-rescue