Fix querying of architecture for entries without subarch string
Fix querying of architecture for entries without subarch string

This fixes, for example, querying aarch64.

Signed-off-by: Timothy Gu <1ed1015336f6a462e9365b18ca61d9eb32e77fa2@gmail.com>
Reviewed-by: Derek Buitenhuis <aff7d637ede26ea82e5226e01b697996cc52e526@gmail.com>
Signed-off-by: Michael Niedermayer <0ba4af815980827fd28782804f80675b937ef955@gmx.at>

TimothyGu/fateserver-node,TimothyGu/fateserver-node