Add arch to symstore product name instead of special casing it.

Rather than using a new field we will add the architecture
to the product name. Otherwise we would have to adjust
symstore_management.py to in some way add the arch to one
of the three fields (product, version, comment) known to
the underlying symbolstore.

This reverts commit 36be22095cc5acf7d9e8a25ba207caa80f4f9612.
This reverts commit cf1bb9933dc2de64bbc8ca12786a699189d8f6b6.