Add references from test to main in multiplatform test project

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/multiplatformProject/lib/src/main/kotlin/PlatformClass.kt

@@ -2,4 +2,6 @@ package foo
 
 header class PlatformClass {
     val value: String
-}
+}
+
+class CommonClass

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/multiplatformProject/lib/src/test/kotlin/PlatformTest.kt

@@ -1,5 +1,7 @@
 package foo
 
 header class PlatformTest {
-    //val value: PlatformClass
-}
+    val value: PlatformClass
+}
+
+class CommonTest(val commonClass: CommonClass)

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/multiplatformProject/libJs/src/test/kotlin/PlatformTest.kt

@@ -1,5 +1,5 @@
 package foo
 
 impl class PlatformTest {
-    //impl val value: PlatformClass = PlatformClass()
+    impl val value: PlatformClass = PlatformClass()
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/multiplatformProject/libJvm/src/test/kotlin/PlatformTest.kt

@@ -1,5 +1,5 @@
 package foo
 
 impl class PlatformTest {
-    //impl val value: PlatformClass = PlatformClass()
+    impl val value: PlatformClass = PlatformClass()
 }