http://mail-index.netbsd.org/netbsd-users/2011/03/28/msg008112.html :
  same error - jdk1.6

to get bootstrap files figgured out - tarring up jdk-image directory
from a sucessful 'make build' according to the 'make-image' script

this is because substituting the files already in the listed jdk7 bootstrap
failed - due to missing javadoc
then, adding javadoc opened up a can of worms.

plan is to just 'grab everyting' to see if jdk7 builds -
then prune from there, possibly creating a 'jdk bootstrap' package

