hg: jdk9/dev/jaxws: 8182405: add legal file for freebxml

[lance.andersen at oracle.com]

Changeset: c9b85ef1567e
Author:    lancea
Date:      2017-06-16 19:12 -0400
URL:       http://hg.openjdk.java.net/jdk9/dev/jaxws/rev/c9b85ef1567e

8182405: add legal file for freebxml
Reviewed-by: mchung

+ src/jdk.xml.bind/share/legal/freebxml.md