Move the bulk of the core-image-tpm recipe into an include in anticipation of adding variations of the image.
Add a 'debug' variation of the core-image-tpm image.

For now this package just leaves the package manager intact and
includes the tboot-utils so we can see the txt log.
Make the measured-image-bootimg recipe to be an include in anticipation of making a debug variant with the core-image-tpm-debug rootfs.
Add a debug variant of the measured-image-bootimg with the core-image-tpm-debug image for the rootfs.
Add new recipe for pcr-calc project.
Include pcr-calc in core-image-tpm-debug image.