Fix incremental compilation optimization when raw expressions change.

[jordwalke]

The --use-hashing feature works well except when the only thing you change in an input source is something like a "raw expression". I believe this is because those raw expressions may be embedded in the "global data" section of the bytecode libraries, but incremental compilation hashes the individual sub-modules in a library. I believe the fix is to recompile everything in the library if anything in the shared data segment changes. There may be other issues with recompilation here too

[jordwalke]

Also, need to take into account the hashes of the imported interfaces - at the module level, not cma level.