Serialization of flexible types supported

compiler/testData/compileKotlinAgainstKotlin/PlatformTypes.A.kt

@@ -0,0 +1,7 @@
+package test
+
+import java.util.*
+
+fun printStream() = System.out
+fun list() = Collections.emptyList<String>()
+fun array(a: Array<Int>) = Arrays.copyOf(a, 2)

compiler/testData/compileKotlinAgainstKotlin/PlatformTypes.B.kt

@@ -0,0 +1,22 @@
+import java.io.PrintStream
+import java.util.ArrayList
+import test.*
+
+// To check that flexible types are loaded
+class Inv<T>
+fun <T> inv(t: T): Inv<T> = Inv<T>()
+
+fun main(args: Array<String>) {
+    printStream().checkError()
+    val p: Inv<PrintStream> = inv(printStream())
+    val p1: Inv<PrintStream?> = inv(printStream())
+
+    list().size()
+    val l: Inv<List<String>> = inv(list())
+    val l1: Inv<MutableList<String>?> = inv(list())
+
+    val a = array(Array<Int>(1){0})
+    a[0] = 1
+    val a1: Inv<Array<Int>> = inv(a)
+    val a2: Inv<Array<out Int>?> = inv(a)
+}

compiler/testData/loadJava/compiledKotlin/type/platform.kt

@@ -0,0 +1,8 @@
+//ALLOW_AST_ACCESS
+package test
+
+import java.util.*
+
+fun printStream() = System.out
+fun list() = Collections.emptyList<String>()
+fun array(a: Array<Int>) = Arrays.copyOf(a, 2)

compiler/testData/loadJava/compiledKotlin/type/platform.txt

@@ -0,0 +1,5 @@
+package test
+
+internal fun array(/*0*/ a: kotlin.Array<kotlin.Int>): kotlin.Array<(out) kotlin.Int!>!
+internal fun list(): kotlin.(Mutable)List<kotlin.String!>!
+internal fun printStream(): java.io.PrintStream!