Added tests with SAM adapters in "invoke" convention.

compiler/testData/codegen/boxWithJava/samAdapters/operators/multiInvoke.kt

@@ -0,0 +1,7 @@
+fun box(): String {
+    val obj = JavaClass()
+
+    var v = "FAIL"
+    obj({ v = "O" }, { v += "K" })
+    return v
+}