Implement kotlin.jvm.overloads annotation for generating all overloads of a method that has default parameter values.

#KT-2095 Fixed

compiler/testData/codegen/boxWithStdlib/jvmOverloads/extensionMethod.kt

@@ -0,0 +1,11 @@
+class C {
+}
+
+[kotlin.jvm.overloads] fun C.foo(o: String, k: String = "K"): String {
+    return o + k
+}
+
+fun box(): String {
+    val m = javaClass<C>().getClassLoader().loadClass("_DefaultPackage").getMethod("foo", javaClass<C>(), javaClass<String>())
+    return m.invoke(null, C(), "O") as String
+}