[elektra/f20] (4 commits) ...Move C++ header to _includedir due to upstream CMake bug.

[Christopher Meng]

Summary of changes:

  f56585e... Update to 0.8.4, add ?_isa macro to devel sub and remove pk (*)
  b0081ce... Add missing cmake BR. (*)
  ec152d7... Add missing boost-devel BR. (*)
  f4e0c69... Move C++ header to _includedir due to upstream CMake bug. (*)

(*) This commit already existed in another branch; no separate mail sent