Include fix for miscompilation of off_t on 32 bit architectures.
- emacs subpackage has been dropped (from upstream): https://github.com/ocaml/ocaml/pull/2078#issuecomment-443322613 https://github.com/Chris00/caml-mode - Remove ocamlbyteinfo and ocamlpluginfo, neither can be compiled. - Disable tests on all architectures, temporarily hopefully. - Package threads/*.mli files.
Small adjustments to ocamldoc packaging.