Module on importC

[Andrea Fontana]

Hello,

Is there a way to set modules name for importc? Or to give 
importc a hint directly on C?

I'm trying to import a project with a struct like:

```
a/b/utils.c
a/b/interface.c

c/d/utils.c
c/d/interface.c

e/f/utils.c
e/f/interface.c
```

All files conflict with each other!

Andrea