RFR: JDK-8190725: Freetype license file provided with configure not included in images

[Erik Joelsson]

The inclusion of the freetype license file has stopped working. For the 
-ri windows profile, we set --with-freetype-license, but the makefile 
logic for creating the java.desktop jmod is broken and doesn't pick it 
up. This patch fixes the FindModuleLegalDirs macro so that 
support/modules_legal/$MODULE gets included as well.

Bug: https://bugs.openjdk.java.net/browse/JDK-8190725
Webrev: http://cr.openjdk.java.net/~erikj/8190725/webrev.01/

/Erik