[arch-dev-public] [signoff] xz-utils and libarchive-2.7.0-2

[Firmicus]

> we had a long discussion about xz/lzma support some time ago. So I finally 
> added xz-utils to testing and rebuild libarchive to make use of it. 

:: Replace lzma-utils with localtesting/xz-utils? [Y/n]
resolving dependencies...
looking for inter-conflicts...
error: failed to prepare transaction (could not satisfy dependencies)
:: yelp: requires lzma-utils>=4.32.7