RFR: JDK-8178064: OpenJDK RI binary should include the license file for freetype

[Erik Joelsson]

Hello,

Please review this late change for JDK 9. It adds a new configure 
parameter --with-freetype-license, which can optionally be set to point 
to a license file for freetype. If freetype bundling is enabled, this 
license file will be included in the java.desktop.jmod file and 
subsequently in the images/{jdk,jre}/legal/java.desktop directory.

Note that freetype comes with a dual license. For normal GPL OpenJDK 
builds, no additional license is needed as freetype is also GPL. This 
feature is only needed when someone is licensing OpenJDK with a 
different license (which the Oracle reference implementation builds do).

This change is considered noreg-doc and will go into jdk9.

Bug: https://bugs.openjdk.java.net/browse/JDK-8178064

Webrev: http://cr.openjdk.java.net/~erikj/8178064/webrev.01

/Erik