[K/N][tests] Added a bunch of tests on incremental compilation

native/native.tests/testData/caches/ic/addMethodToInterface2/lib1/lib1.file1.1.kt

@@ -0,0 +1,6 @@
+package test1
+
+interface I {
+    fun baz(): String
+    fun foo(): Int
+}

native/native.tests/testData/caches/ic/addMethodToInterface2/lib1/lib1.file1.kt

@@ -0,0 +1,5 @@
+package test1
+
+interface I {
+    fun foo(): Int
+}

native/native.tests/testData/caches/ic/addMethodToInterface2/lib1/lib1.file2.kt

@@ -0,0 +1,5 @@
+package test1
+
+interface J : I {
+    fun bar(): String
+}

native/native.tests/testData/caches/ic/addMethodToInterface2/lib2/lib2.kt

@@ -0,0 +1,5 @@
+package test2
+
+import test1.*
+
+fun bar(x: J) = x.bar()

native/native.tests/testData/caches/ic/addMethodToInterface2/main/main.1.kt

@@ -0,0 +1,14 @@
+import kotlin.test.*
+import test1.*
+import test2.*
+
+class JImpl : J {
+    override fun baz() = "qxx"
+    override fun foo() = 42
+    override fun bar() = "zzz"
+}
+
+@Test
+fun runTest() {
+    assertEquals("zzz", bar(JImpl()))
+}

native/native.tests/testData/caches/ic/addMethodToInterface2/main/main.kt

@@ -0,0 +1,13 @@
+import kotlin.test.*
+import test1.*
+import test2.*
+
+class JImpl : J {
+    override fun foo() = 42
+    override fun bar() = "zzz"
+}
+
+@Test
+fun runTest() {
+    assertEquals("zzz", bar(JImpl()))
+}