remove linker hacks

- OSX's 10.6 version of ld crashed when
  handling symbols in empty sections

- OSX's 10.5 linker had unknown issues
  with zero filled sections
  (also see Bugzilla 3502)

- we no longer rely on the order of sections
  and we no longer emit section frames either
  so all of these workarounds can go

- Gestalt was deprecated in the 10.8 SDK
we no longer depend on the OSX SDK
echo -n is not POSIX compliant

- man 1 echo on OSX recommend to use printf instead
Merge pull request #1697 from dawgfoto/removeOSXLinkerHacks

Remove osx linker hacks