Transform Throwable members to properties

compiler/testData/codegen/box/builtinsProperties/throwable.kt

@@ -0,0 +1,10 @@
+fun box(): String {
+    try {
+        throw Throwable("OK", null)
+    } catch (t: Throwable) {
+        if (t.cause != null) return "fail 1"
+        return t.message!!
+    }
+
+    return "fail 2"
+}

compiler/testData/codegen/box/classes/exceptionConstructor.kt

@@ -3,5 +3,5 @@ class GameError(msg: String): Exception(msg) {
 
 fun box(): String {
   val e = GameError("foo")
-  return if (e.getMessage() == "foo") "OK" else "fail"
+  return if (e.message == "foo") "OK" else "fail"
 }

compiler/testData/codegen/box/controlStructures/tryCatchInExpressions/multipleCatchBlocks.kt

@@ -13,7 +13,7 @@ fun box(): String =
             "e2"
         }
         catch (e3: Exception3) {
-            e3.getMessage()
+            e3.message
         }
         catch (e: Exception) {
             "e"