x86_64 is used as a baseline: the "x86_64" entry, whatever status it has,
is transformed into "all", and then the other entries in ARCHITECTURES
either dropped or rearranged appropriately.
* Create a wavpack_bin sub-package to make the base package depend
on no other package.
* Move wavpack(1), wvgain(1), wvunpack(1) and wvtag(1) (as well as
the dependency on lib:libiconv) to the wavpack_bin sub-package.
* While at it, define commandSuffix to be more consistent with
other packages which already define it.
waddlesplash