enable bootchartd to use kernel process accounting for noticing
all processes.

also fix various little bits around the initramfs init.

modifications to makefile and initramfs init that were left out
from previous commit.

and add a boot option keep_apk_new to keep them. Might be useful during
upgrades.

So we can support multiple kernels in parallel.

Use the built repositories as source for the iso components rather than
just pick whats in a given dir.

alpine-baselayout does it.

set default repositories

Read the version from .alpine-release on media. Also display the init
script version.

also create the symlink for kernel modules

also link mkiso to use the makefile

tries to get correct dependencies for modloop, initramfs and iso
so minimum amount of work is required for rebuild.