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

native/native.tests/testData/caches/ic/addMethodToInterface1/lib1/lib1.1.kt

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

native/native.tests/testData/caches/ic/addMethodToInterface1/lib1/lib1.kt

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

native/native.tests/testData/caches/ic/addMethodToInterface1/lib2/lib2.kt

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

native/native.tests/testData/caches/ic/addMethodToInterface1/main/main.1.kt

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

native/native.tests/testData/caches/ic/addMethodToInterface1/main/main.kt

@@ -0,0 +1,12 @@
+import kotlin.test.*
+import test1.*
+import test2.*
+
+class IImpl : I {
+    override fun foo() = 42
+}
+
+@Test
+fun runTest() {
+    assertEquals(42, bar(IImpl()))
+}