backend: add some trivial tests for RTTI

backend.native/tests/build.gradle

@@ -262,3 +262,11 @@ task cycle(type: UnitKonanTest) {
 task cycle_do(type: UnitKonanTest) {
     source = "codegen/cycles/cycle_do.kt"
 }
+
+task abstract_super(type: UnitKonanTest) {
+    source = "datagen/rtti/abstract_super.kt"
+}
+
+task vtable1(type: UnitKonanTest) {
+    source = "datagen/rtti/vtable1.kt"
+}

backend.native/tests/datagen/rtti/abstract_super-test.c

@@ -0,0 +1,9 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  // This test now checks that the source can be successfully compiled and linked;
+  // TODO: check the contents of TypeInfo?
+
+  return 0;
+}

backend.native/tests/datagen/rtti/abstract_super.kt

@@ -0,0 +1,3 @@
+abstract class Super
+
+class Foo : Super()

backend.native/tests/datagen/rtti/vtable1-test.c

@@ -0,0 +1,9 @@
+extern void *resolve_symbol(const char*);
+
+int
+run_test() {
+  // This test now checks that the source can be successfully compiled and linked;
+  // TODO: check the contents of TypeInfo?
+
+  return 0;
+}

backend.native/tests/datagen/rtti/vtable1.kt

@@ -0,0 +1,7 @@
+abstract class Super {
+    abstract fun bar()
+}
+
+class Foo : Super() {
+    final override fun bar() {}
+}