[oe] Angstrom opkg feed config

[Steffen Sledz]

At the moment recipes/angstrom/angstrom-feed-configs.bb creates
also config file for ${MACHINE_ARCH} specific packages. But at
least for the machine arch 'hipox' (i'm not sure for other ones)
the given URI does not exist. This results in an error when
calling 'opkg update':

Collected errors:
 * Failed to download http://www.angstrom-distribution.org/feeds/unstable/ipk/glibc/armv5te/machine/hipox/Packages.gz, error 1

Does this directory intentionally not exist?

Wouldn't it be better to create an empty Packages.gz if there
are no machine arch specific packages?

Steffen