When building with crosscompile to bootstrap a new target it might
be handy to not include the dependencies etc.

This avoids confusion when abuild picks dependencies from testing
when building main.

This option is normally used for bootstrapping a build env. Chances are big
that apk-tools is not around.

to make life easier for volatile packages

override with -F

We also make sure we source the APKBUILD when we are in the directory
holding the APKBUILD file. Some of the packages sources others
with relative references. (for example kernel 3rd party packages)

try keep code in abuild cleaner by moving out creation of new apkbuild
to separate script.

prepare is run before build(). this allows uses to do patching before
configuring and building in a separate step.

fakeroot seems do some kind of locking which kills performance on
multicores processors. We can run "make" and "make install" in 2 steps
with only hte latter in fakeroot.

and install scripts should not be in $source

This is needed when bootstrapping the system.

otherwise will awk not detect empty fields