Support introspection of parameter names and indices in reflection

compiler/testData/codegen/boxWithStdlib/reflection/parameters/propertySetter.kt

@@ -0,0 +1,24 @@
+import kotlin.reflect.*
+import kotlin.test.assertEquals
+
+var default: Int = 0
+
+var defaultAnnotated: Int = 0
+    public set
+
+var custom: Int = 0
+    set(myName: Int) {}
+
+fun checkPropertySetterParam(property: KMutableProperty<*>, name: String?) {
+    val parameter = property.setter.parameters.single()
+    assertEquals(0, parameter.index)
+    assertEquals(name, parameter.name)
+}
+
+fun box(): String {
+    checkPropertySetterParam(::default, null)
+    checkPropertySetterParam(::defaultAnnotated, null)
+    checkPropertySetterParam(::custom, "myName")
+
+    return "OK"
+}