trace-cmd: Try to autodetect number of guest CPUs in setup-guest if not specified

When no number of guest CPUs is provided with the -c flag to `trace-cmd
setup-guest`, try to autodetect it using virsh for libvirt managed guests.

Link: http://lore.kernel.org/linux-trace-devel/20191008081537.11536-11-kaslevs@vmware.com

Signed-off-by: Slavomir Kaslev <kaslevs@vmware.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2 files changed