Compile the setter method

Property definitions

nitc :: java_compiler $ AAttrPropdef :: compile_setter
	# Compile the setter method
	private fun compile_setter(v: JavaCompilerVisitor, mpropdef: MPropDef, arguments: Array[RuntimeVariable]) do
		var mtype = v.compiler.mainmodule.object_type
		var recv = arguments.first
		var val = v.new_expr("args[1]", mtype)
		v.write_attribute(self.mpropdef.as(not null).mproperty, recv, val)
		v.ret v.null_instance
	end
src/compiler/java_compiler.nit:1853,2--1860,4