New review comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/pull/32070#discussion_r688920893

Comment:
With that, files from second archive are left in builddir, because xbps-src removes only `wrksrc`, which is `nginx-${version}` extracted from first archive here.
Add `create_wrksrc=yes` `build_wrksrc="nginx-${version}"` `TEST_NGINX_BINARY="$PWD/objs/nginx"`, so both archives are extracted under `wrksrc` and get removed after build.