Fix paths in haiku_cross_devel packages.

* since this is now meant to be installed into an architecture-specific
  (sysroot-)folder, we need to drop the architecture-specific subpaths
Fix haiku_cross_devel package(s).

* those packages need to be installed on any system that wants to build
  for the respective target architecture, so they need to have the
  package architecture 'any'
* adjust to not require 'haiku', as that isn't needed and wouldn't be
  available either
* use concatenation by macro to inject the target architecture into the
  provides definition
Minor fix: extend copyright in all package infos to 2013.
Rename haiku_cross_devel packages.

* haiku_cross_devel is now haiku_cross_devel_sysroot
* haiku_cross_devel_wrapper is now haiku_cross_devel