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.
* Update and rename povray-3.7.0.4.recipe to povray-3.7.0.8.recipe
* Rename povray-3.7.0.4.patchset to povray-3.7.0.8.patchset
* Update description
* Simplify Boost Lib lookup for x86 2nd arch.