8240542: Switch FX build to use JDK 14 as boot JDK

Reviewed-by: jvos, arapte

Author: kevinrushforth

build.properties

@@ -73,8 +73,8 @@ javadoc.header=JavaFX 15
 ##############################################################################
 
 # JDK
-jfx.build.jdk.version=13.0.1
-jfx.build.jdk.buildnum=9
+jfx.build.jdk.version=14
+jfx.build.jdk.buildnum=36
 jfx.build.jdk.version.min=11
 jfx.build.jdk.buildnum.min=28