Support references to extension properties in JVM codegen

#KT-1183 In Progress

compiler/testData/codegen/boxWithStdlib/callableReference/property/simpleExtension.kt

@@ -0,0 +1,12 @@
+val String.id: String
+    get() = this
+
+fun box(): String {
+    val pr = String::id
+
+    if (pr["123"] != "123") return "Fail value: ${pr["123"]}"
+
+    if (pr.name != "id") return "Fail name: ${pr.name}"
+
+    return pr.get("OK")
+}

compiler/testData/codegen/boxWithStdlib/callableReference/property/simpleMutableExtension.kt

@@ -0,0 +1,18 @@
+var storage = 0
+
+var Int.foo: Int
+    get() {
+        return this + storage
+    }
+    set(value) {
+        storage = this + value
+    }
+
+fun box(): String {
+    val pr = Int::foo
+    if (pr.get(42) != 42) return "Fail 1: ${pr[42]}"
+    pr.set(200, 39)
+    if (pr.get(-239) != 0) return "Fail 2: ${pr[-239]}"
+    if (storage != 239) return "Fail 3: $storage"
+    return "OK"
+}

compiler/testData/compileKotlinAgainstKotlin/PropertyReference.A.kt

@@ -0,0 +1,6 @@
+package a
+
+public var topLevel: Int = 42
+
+public val String.extension: Long
+    get() = length.toLong()

compiler/testData/compileKotlinAgainstKotlin/PropertyReference.B.kt

@@ -0,0 +1,14 @@
+import a.*
+
+fun main(args: Array<String>) {
+    val f = ::topLevel
+    val x1 = f.get()
+    if (x1 != 42) throw AssertionError("Fail x1: $x1")
+    f.set(239)
+    val x2 = f.get()
+    if (x2 != 239) throw AssertionError("Fail x2: $x2")
+
+    val g = String::extension
+    val y1 = g.get("abcde")
+    if (y1 != 5L) throw AssertionError("Fail y1: $y1")
+}