tpm flist for zos

[muhamadazmy]

I already did work on the base image 0-initramf to build TPM in the base image of zos. But the problem with this approach is that the tpm binary will only be available for newly booted machine (with that base image)

Instead we prefer to have zos built as a runtime flist to be installed on all zos nodes. So basically what we need to do is rewrite the tpm builder scripts for zos flist

The code in 0-iniramfs is available here https://github.com/threefoldtech/0-initramfs/pull/55