Bug#725143: unbuildable on some archs

[Rebecca N. Palmer]

I don't have any of the affected architectures (hence why it took so 
many attempts to get right); my concern has always been only that the 
strict partial-removal policy (cf. #723770, #724678) would make it hard 
for your reverse dependencies to switch from an any-arch 1.8 to a 
non-any-arch 1.9, and it hence isn't an urgent problem if you don't want 
to transition yet.