Can't build the plugin with JavaProtocol.hx built with Haxe 3.2.0

[yanhick]

The code generation for the Java target has changed in 3.2.0.

When doing of full build of the plugin, including JavaProtocol.hx located in hxcpp-debugger-protocol the plugin can't be built as it relies on the Java code generation format from previous Haxe version.

For example here, it assumes the generated Java class has a __a field which is no longer the case when JavaProtocol.hx is built with Haxe 3.2.0 :
https://github.com/TiVo/intellij-haxe/blob/master/src/13.1/com/intellij/plugins/haxe/runner/debugger/HaxeDebugRunner.java#L544