Man pages for wsgen and wsimport

[Tomas-Kraus]

Up to Java 10 the JDK provided man pages for the wsgen and wsimport tools. Since these pages aren't included in the RI it would probably be a good idea to salvage them and put them along the wsgen/wsimport bash scripts.

They can be found here:

http://hg.openjdk.java.net/jdk10/jdk10/jdk/raw-file/tip/src/linux/doc/man/wsgen.1
http://hg.openjdk.java.net/jdk10/jdk10/jdk/raw-file/tip/src/linux/doc/man/wsimport.1

Source: javaee/metro-jax-ws#1241
Author: ebourg