Turning off font anti-antialiasing patch

[François Jaouen]

While porting a swing application to JavaFX 8, I had to patch JavaFX 8 to disable font anti-aliasing on linux.

But, for readibility of text,  I also had to reenable font hinting, in this case only.

Since, I've found this open bug https://bugs.openjdk.java.net/browse/JDK-8092207.

I will be glad to publish this contribution if it fits in OpenJFX plans. But as it requires some rework, let me know first if it has any interest.

François Jaouen