Support KParameter.kind: instance, extension receiver, or value

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

@@ -0,0 +1,18 @@
+import kotlin.reflect.*
+import kotlin.reflect.KParameter.Kind.*
+import kotlin.test.assertEquals
+
+class A {
+    fun Int.foo(x: String) {}
+
+    inner class Inner(s: String) {}
+}
+
+fun box(): String {
+    val foo = A::class.memberExtensionFunctions.single()
+
+    assertEquals(listOf(INSTANCE, EXTENSION_RECEIVER, VALUE), foo.parameters.map { it.kind })
+    assertEquals(listOf(INSTANCE, VALUE), A::Inner.parameters.map { it.kind })
+
+    return "OK"
+}