Misc improvements and bug fixes for perf

From: Andi Kleen
Date: Mon Mar 11 2019 - 16:25:23 EST

Mostly unrelated to each other, so can be picked'n'chosed.

- Fix perf stat --no-scale
- Support --reltime in perf script
- Fix crashes with stat -r
- Handle JITed code better in perf report
- Allow to limit rotated perf.data files
- Filter metrics in perf list
- Show all sort keys in perf report help
- Fix multiplexing formula

Also available in
git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-misc perf/misc-fixes-4