Add ident-like blobs to shim.efi for version checking.

I feel dirty.
Improve PE image bounds checking.

Signed-off-by: Peter Jones <pjones@redhat.com>
Do more strict checking on PE Headers.

Signed-off-by: Peter Jones <pjones@redhat.com>
Try to actually make debug printing look reasonable.

Signed-off-by: Peter Jones <pjones@redhat.com>