/usr/lib/eclipse/plugins/javax.el_3.0.0.jar is in eclipse-platform 3.8.1-11.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/eclipse/plugins/../../../share/java/el-api-3.0.jar
/usr/lib/eclipse/plugins/../../../share/java/el-api-3.0.jar