package/libteam: new package

This package is the userspace daemon, client tool, and library for the
team device implementation in the Linux kernel.  Team is an alternative
to the traditional bonding driver and provides more "runners", or modes,
of operation for aggregates.  None of these modes are enabled by default
and need a custom kernel config.

Backported the three most relevant patches to fix musl build, revert of
a fix prior to 1.31 that can cause high CPU load, and a fix to prevent
failing to stop the daemon due to too short timeout for kill command.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
[yann.morin.1998@free.fr: slight reword in help text]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>