* 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.
This reverts commit 1606e09674.
As Oliver said we might want to support different python version
on different architectures, so we should stick to arch-dependent
for python stuff anyway.
* portVersionedName contains the secondary architecture,
so using it means secondary package builds fail.
example: $portVersionedName is libwow_x86-0.0.0 when
doing an x86 build on x86_gcc2
