Capture QEMU logs

This commit adds support for capturing any qemu logs. We were previously
capturing the libvirt logs, but for debugging it is useful to also have
the qemu logs.

Change-Id: I0d14074430a6a8ec6d99722646225f4ca3262080

functions.sh

@@ -475,6 +475,10 @@ function cleanup_host {
     # libvirt
     if [ -d /var/log/libvirt ] ; then
         sudo cp /var/log/libvirt/libvirtd*.log $BASE/logs/
+        if [ -d /var/log/libvirt/qemu ] ; then
+            sudo mkdir $BASE/logs/qemu
+            sudo cp /var/log/libvirt/qemu/* $BASE/logs/qemu/
+        fi
     fi
 
     # sudo config