* Referring the current haiku version explicitly is not needed, since
the RequiresUpdater takes care of setting the version of Haiku used
for building a package.
* fix dependencies and build system
* check doesn't build correctly with haikuporter on x86_64 beause
of a Python bug (hard link extraction in tar files)
Somehow haikuporter doesn't like uppercase names,
it keeps waiting for the lowercase-named package to be activated
while the uppercase one is already...