Why no stack folding with libbpf offcputime?

[treynash]

libbpf tools are meant to be a replacement for BCC tools, however offcputime lacks the stack folding argument -f.

What is the recommended way to use the libbpf version of offcputime to generate a flame graph similar to how one does it with the BCC version.

FWIW, I see you have a PR that someone submitted over a year ago to add this option.