systemd: split out systemd-analyze

Split systemd-analyze to a separate package, to remove the implicit
dependency on python. (At least the rpm-packaging backend created a
run-time dependency on python).

Add an RDEPENDS_${PN}-analyze on python-dbus, as this is required for
systemd-analyze to work.

Add an RRECOMMENDS_${PN}-analyze on python-pycairo, as the plot command
in systemd-analyze requires this package.

Signed-off-by: Anders Darander <anders@chargestorm.se>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>