I completely ruined this now and therefore I had to make
it new again:
* I split the parameters into smaller chunks now and added
comments about why we have chosen those.
* I move it all to configure_build() since we do not need
to check if the host architecture is 64 bit capable, but
the architecture we are building for.
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>