Accepting request 714593 from home:dimstar:Factory

- Add baselibs.conf: libarchive gained zstd support and provides
  -32bit libraries. This means, zstd also needs to provide -32bit
  libs.

OBS-URL: https://build.opensuse.org/request/show/714593
OBS-URL: https://build.opensuse.org/package/show/Archiving/zstd?expand=0&rev=35

zstd.spec

@@ -26,6 +26,7 @@ License:        BSD-3-Clause AND GPL-2.0-only
 Group:          Productivity/Archiving/Compression
 URL:            https://github.com/facebook/zstd
 Source0:        https://github.com/facebook/zstd/releases/download/v%{version}/%{name}-%{version}.tar.gz
+Source99:       baselibs.conf
 Patch1:         pzstd.1.patch
 BuildRequires:  gcc
 # C++ is needed for pzstd only