If you build a ramdisk with ramdisk-image-create and forget to specify
-o, you end up with a .kernel and .initramfs file as the image outputs.
This commit defaults the $IMAGE_NAME value to image so you'd end up
with image.kernel and image.initramfs
Change-Id: I10f3ac9ad178c32119523e4da930070e3ade4f73
Since we are using bash syntax in some of the element fragments,
we should make sure we use bash for all of them, so that things don't
break on systems where /bin/sh != /bin/bash.
Change-Id: If2f043c57aa4e1492b7f9839213ef6123f683612
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