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.

include a modified version of bootchartd, and modify the initramfs
to take start recording of boot sequence to /var/log/bootchart.tgz
if "chart" option is specified in boot command line.

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

and generate index if it is missing, even if all packages are up2date.

like when main package depends on subpackages

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.

and dont build index if its not needed

-P lets user specify the REPODEST on cmd line

This allows ABUILDS to call the default_doc func and append stuff missing

- check that md5sums correspond to source
- warn if maintainer is missing

so far only option avaiable is !strip, which disables stripping of binaries.

The -r option will only install deps from system repo and fail if any is
missing.

The -R option will parse the aports tree and try build the missing packages
and then install the newly built package.

set default repositories