/usr/share/solr/web/WEB-INF/lib/slf4j-jdk14.jar is in solr-common 3.6.2+dfsg-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/solr/web/WEB-INF/lib/../../../../java/slf4j-jdk14.jar
/usr/share/solr/web/WEB-INF/lib/../../../../java/slf4j-jdk14.jar