Bug#916279: qemu-system-common: Overwrite /usr/share/doc-base/qemu-system-doc without declaring replacement

[Christian Ehrhardt]

> Wouldn't Replaces: qemu-system-data (<< 1:3.1+dfsg-1) be better? I am not an
> expert on Debian Policy.

IMHO:
(<< 1:3.1+dfsg-1~)

But since the fix will be part of a -2 upload eventually more likely:
(<< 1:3.1+dfsg-2~)