simplify rt.sections_osx.getSection

- only check for target specific mach header
Merge pull request #463 from dawgfoto/getSectionOSX

simplify rt.sections_osx.getSection
Add Windows error code ERROR_INSUFFICIENT_BUFFER.
Merge pull request #466 from jacob-carlborg/windows_error_code

Add Windows error code ERROR_INSUFFICIENT_BUFFER.
Add Linux/PPC(64) to stat.d

The definition follows the Linux kernel. The change is required in
order to compile druntime on Linux/PPC(64).
Merge pull request #468 from redstar/ppcstat

Add Linux/PPC(64) to stat.d