[webkit] [10] 8178440: Build libxml2 and libxslt from source

[Arunprasad Rajkumar]

Hello Kevin,

Please review the following changeset.

JBS: https://bugs.openjdk.java.net/browse/JDK-8178440
Webrev: http://cr.openjdk.java.net/~arajkumar/8178440/webrev

Regards,
Arun