A set of tests on fake override motion in class hierarchy

(cherry picked from commit 4612e03d24fb3ff55c1622ea11fe892d5f1f1965)

backend.native/tests/build.gradle

@@ -4001,6 +4001,20 @@ task library_ir_provider_mismatch(type: KonanDriverTest) {
     }
 }
 
+standaloneTest("fake_override_0") {
+    def sources = "$projectDir/link/fake_overrides"
+    def dir = buildDir.absolutePath
+    doBeforeBuild {
+        konanc("$sources/base.kt -p library -o $dir/base")
+        konanc("$sources/move.kt -p library -o $dir/move -r $dir -l base")
+        konanc("$sources/use.kt -p library -o $dir/use -r $dir -l move")
+        konanc("$sources/move2.kt -p library -o $dir/move -r $dir -l base")
+    }
+    source = "$sources/main.kt"
+    flags = ["-l", "use", "-r", "$dir"]
+    goldValue = "Moved\nMoved\nChild\nSuper\n"
+}
+
 if (isAppleTarget(project)) {
     task testObjCExport(type: FrameworkTest) {
         final String frameworkName = 'Kt'

backend.native/tests/link/fake_overrides/base.kt

@@ -0,0 +1,6 @@
+package serialization.fake_overrides
+
+open class A {
+    open fun qux() = "Super"
+    open fun tic() = "Super"
+}

backend.native/tests/link/fake_overrides/main.kt

@@ -0,0 +1,9 @@
+import serialization.fake_overrides.*
+fun test1() = println(Z().bar())
+
+fun main() {
+    test0()
+    test1()
+    test2()
+    test3()
+}

backend.native/tests/link/fake_overrides/move.kt

@@ -0,0 +1,15 @@
+package serialization.fake_overrides
+
+open class X {
+}
+
+class Y: X() {
+    fun bar() = "Stale"
+}
+
+class B: A() {
+}
+
+class C: A() {
+    override fun tic() = "Child"
+}

backend.native/tests/link/fake_overrides/move2.kt

@@ -0,0 +1,15 @@
+package serialization.fake_overrides
+
+open class X {
+    fun bar() = "Moved"
+}
+
+class Y: X() {
+}
+
+class B: A() {
+    override fun qux() = "Child"
+}
+
+class C: A() {
+}

backend.native/tests/link/fake_overrides/use.kt

@@ -0,0 +1,8 @@
+package serialization.fake_overrides
+
+class Z: X() {
+}
+
+fun test0() = println(Y().bar())
+fun test2() = println(B().qux())
+fun test3() = println(C().qux())