ramdisk-defaults file is sourced before chroot to an image being created
is executed. Busybox path should be set inside chroot instead.
Change-Id: Ic0e1d3093ca9d489dd96b14157e93b336cf0baee
Ramdisks are now built inside a chroot which is built by the normal
image build process. Doing so improves our independence of the
precise state of the build host.
This fixes bug 1194055.
Change-Id: Ibc254fbb9e7b404b5f38c1b35bcde8a4136e8e28