Support parameter names for Java 8 classes in reflection

Also support specifying additional options to javac in codegen tests, which was
needed to compile Java sources with the "-parameters" option

compiler/testData/codegen/java8/boxWithJava/reflection/realParameterNames/J.java

@@ -0,0 +1,5 @@
+public class J {
+    public J(String constructorParam) {}
+
+    public static void foo(int methodParam) {}
+}