Support increment and '*=' operations on inline properties

compiler/testData/codegen/boxInline/property/augAssignmentAndIncInClassViaConvention.kt

@@ -0,0 +1,43 @@
+// FILE: 1.kt
+// IGNORE_BACKEND: JS
+package test
+
+class Test(var result: Int)
+
+class A {
+    var result = Test(1)
+
+    inline var z: Test
+        get() = result
+        set(value) {
+            result = value
+        }
+}
+
+operator fun Test.plus(p: Int): Test {
+    return Test(result + p)
+}
+
+operator fun Test.inc(): Test {
+    return Test(result + 1)
+}
+
+// FILE: 2.kt
+import test.*
+
+fun box(): String {
+    val a = A()
+    a.z = Test(1)
+    a.z += 1
+    if (a.result.result != 2) return "fail 1: ${a.result.result}"
+
+    var p = a.z++
+    if (a.result.result != 3) return "fail 2: ${a.result.result}"
+    if (p.result != 2) return "fail 3: ${p.result}"
+
+    p = ++a.z
+    if (a.result.result != 4) return "fail 4: ${a.result.result}"
+    if (p.result != 4) return "fail 5: ${p.result}"
+
+    return "OK"
+}