Hide kernel functions with --no-kernel option

[honggyukim]

The recent kernel shows more and more kernel functions which look unrelated so the trace output with kernel functions become too much verbose.

It'd be better to hide those kernel functions when users want, so I would like to add an option --no-kernel just like --no-libcall.

This option is only useful in analysis commands.

[namhyung]

I think we can use -N .@kernel.

[honggyukim]

Does it work in replay command?

[namhyung]

I think so.

[honggyukim]

I can’t run it now but I saw the -N func@kernel didn’t work in replay command unexpectedly.

[namhyung]

Then it's a bug, how did it run?