Openjfx building - gradle configuration

[Cirujano Cuesta, Diego]

Hi,

I would like to inform about an error(innecesary step) in the build documentation page: https://wiki.openjdk.java.net/display/OpenJFX/Building+OpenJFX

Gradle Wrapper is commited, that means, we do not need to install/configure it. We just need to make use of ./gradlew or ./gradlew.bat

Could someone update the documentation?

Thank you.

Cheers,
Diego