node-labeller.sh: Make the script more verbose

Use set -x to print commands and their arguments as they are executed.

Signed-off-by: Vasiliy Ulyanov <vulyanov@suse.de>

cmd/virt-launcher/node-labeller/node-labeller.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -ex
 
 KVM_MINOR=$(grep -w 'kvm' /proc/misc | cut -f 1 -d' ')
 VIRTTYPE=qemu