trace-cmd: Mount debugfs if it is not mounted
trace-cmd: Mount debugfs if it is not mounted

If debugfs is not mounted, then mount it for the user. When debugfs
is configured in the kernel the directory /sys/kernel/debug should
exist. Mount it there and make Greg KH happy.

Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

bigzz/trace-cmd,bigzz/trace-cmd