kexecboot-cfg: maintenance update to v. 0.2

This configuration file is only suitable for kexecboot > 0.5.9.
With the upcoming release of linux_4.0 based kexecboot kernels it is preferable
to clearly distinguish old and new versions.

Fix WARNING: ... kexecboot-cfg-0.1 ('S') doesn't exist, please set 'S' to a proper value
Remove PR
Increase PV

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>