Supported SAM constructor calls without function literal.

compiler/testData/codegen/box/sam/nonLiteralRunnable.kt

@@ -0,0 +1,7 @@
+fun box(): String {
+    var result = "FAIL"
+    val f = { result = "OK" }
+    val r = Runnable(f)
+    r.run()
+    return result
+}