apparmor, libvirt-qemu: Allow access to certificates used by libvirt-vnc
apparmor, libvirt-qemu: Allow access to certificates used by libvirt-vnc

When setting up VncTLS according to the official Libvirt documentation,
only one certificate for libvirt/libvirt-vnc is used. The document
indicates to use the following directories :

 /etc/pki/CA
 /etc/pki/libvirt
 /etc/pki/libvirt/private

in order to manage the certificates used by libvirt-vnc.

Bug-Ubuntu: https://bugs.launchpad.net/bugs/901272

Signed-off-by: Christian Ehrhardt <48da28e2c2cd455d60e19b14c46925e20a3c5d5b@canonical.com>
Signed-off-by: Stefan Bader <00beb3b1b08625be3b68f3989c75be8de7f2fd89@canonical.com>

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