noarch main package, arch subpackage?

[Elan Ruusamäe]

it's possible to create noarch subpackage with rpm5,
but what if the main package (%files) ought to be noarch but some 
subpackage to be arch package?

example:
https://github.com/pld-linux/gnome-themes-standard/blob/auto/th/gnome-themes-standard-3.14.2.3-1/gnome-themes-standard.spec#L96-L118

here gnome-themes-standard and gnome-themes-standard-accessibility are 
noarch, but only gtk2-theme-engine-adwaita subpackage contains arch 
specific files...


-- 
glen