salt: Fix Python import error for the distro package
salt: Fix Python import error for the distro package

Add missing python3-distro as a build time dependency. This
dependency is required in Python 3.8 and above.

Signed-off-by: Shruthi Ravichandran <db26f49c821f5e8eba3f4f30a1d200e2416b0696@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt