The solr/dist/ directory is currently used:
- to hold binary artifacts to be used by example configurations;
- to store intermediate binary, source and javadoc archives that will be part of a release packages and deployed as maven artifacts; and
- to hold the results of the package, package-src and generate-maven-artifacts targets: binary and source packages and maven artifacts.
Release packages and maven artifacts should go someplace else so that the files comprising a release are clearly separated from the other stuff.