Add version header to modules

[marekjm]

Modules should be versioned. This would provide certain benefits:

• the VM can know if it must relink the code when it encounters link instruction, or can skip it
• machine would be able to use multiple versions of the code simultaneously

Example without versioned modules: process P1 is in the middle of a function module::a/1, and process P2 requests module module to be relinked. Machine relinks the code. Process P1 calls module::b/1 and crashes because implementation of the module have changed.

Example with versioned modules: process P1 is in the middle of a function module::a/1, and process P2 requests module module to be relinked. Machine relinks the code. Process P1 calls module::b/1, and sends the version of the module along with function signature when requesting entry point. VM supplies entry point for that version. Process P2 calls module::a/1 but uses newer version. Machine supplies entry point for that newer version.

[marekjm]

Tracked by issue b0c4d6d67baa69a3c39af4ae24688c6a58043afc.