[mcetool] Add prototypes for all local functions
[mcetool] Add prototypes for all local functions

Functions as a kind of table of contents, and makes the
need for refactoring more obvious.

Signed-off-by: Simo Piiroinen <6d5e5360bed3d486f7d9fb26b0f737f7d4fd45ee@jollamobile.com>

spiiroin/mce,spiiroin/mce,spiiroin/mce,spiiroin/mce