dev-util/rt-tests: A collection of latency testing tools (new package)

dev-util/rt-tests: A collection of latency testing tools (new package)

rt-tests contains a set of programs that test and measure various components of
real-time kernel behavior, such as timer latency, signal latency and the
functioning of priority-inheritance mutexes. Additionally it contains hackbench,
a program to generate work for the scheduler.

Closes: https://bugs.gentoo.org/705150
Package-Manager: Portage-2.3.79, Repoman-2.3.16
Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
Closes: https://github.com/gentoo/gentoo/pull/14303
Signed-off-by: Joonas Niilola <juippis@gentoo.org>