modules size in mkimage

[Andrei Borzenkov]

mkimage sets module size to aligned value; later it is used to actually 
process it which /may/ lead to inconsistency (as any comparison is 
against stored aligned size, not actual module size).

Same applies to all other embedded types actually. The only one that 
does it right is pubkey.

Just to make sure I do not miss something obvious; otherwise I'll make a 
patch.