perf: package python modules into perf-python

perf: package python modules into perf-python

The scripts that are part of perf require python and supporting modules.
The existing perf-pyton dependency only brought in core python, which
left us unable to actually execute the scripts on target.

With this additional runtime dependency, we can now execte the sample
analysis scripts when perf-scripting is availble.

This is a partial fix for [YOCTO #9069], since there are still scripts
looking for non-existent modules, and those will be dealt with in
future releases.

(From OE-Core rev: 1aa2d2a5e91fddb80c792d6c2ff5fd2e80c751eb)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>