fix Issue 10457 - _d_toObject might fail with shared libraries

- Interface.offset can't be negative so it should be an unsigned value
Add types and constants for Linux/PPC64.

Adds types and constants for Linux/PPC64 to changed modules.
Merge pull request #535 from redstar/ppc64

Add types and constants for Linux/PPC64.
Merge pull request #529 from dawgfoto/fix10457

fix Issue 10457 - _d_toObject might fail with shared libraries
Fix issue 6646: array.reserve should be callable from SafeD.
Simplify unittest per Kenji's comments.
Merge pull request #536 from quickfur/issue6646

Fix issue 6646: array.reserve should be callable from SafeD.