Improve object arrays support. (#182)

Also fix the way how symbol names are being generated. Before arrays2.kt was not linking.

backend.native/tests/build.gradle

@@ -301,6 +301,11 @@ task array1(type: RunKonanTest) {
     source = "runtime/collections/array1.kt"
 }
 
+task array2(type: RunKonanTest) {
+    goldValue = "0\n2\n4\n6\n8\n40\n"
+    source = "runtime/collections/array2.kt"
+}
+
 task if_else(type: RunKonanTest) {
     source = "codegen/branching/if_else.kt"
 }
@@ -536,6 +541,10 @@ task moderately_large_array(type: RunKonanTest) {
     source = "runtime/collections/moderately_large_array.kt"
 }
 
+task moderately_large_array1(type: RunKonanTest) {
+    goldValue = "-45392\n"
+    source = "runtime/collections/moderately_large_array1.kt"
+}
 
 task string_builder0(type: RunKonanTest) {
     goldValue = "OK\n"

backend.native/tests/codegen/basics/array_to_any.kt

@@ -3,5 +3,5 @@ fun main(args: Array<String>) {
 }
 
 fun foo(): Any {
-    return Array<Any?>(0)
+    return Array<Any?>(0, { i -> null })
 }

backend.native/tests/runtime/collections/array0.kt

@@ -24,6 +24,6 @@ fun main(args : Array<String>) {
     val booleanArray = BooleanArray(12)
     println(booleanArray.size.toString())
 
-    val stringArray = Array<String>(13)
+    val stringArray = Array<String>(13, { i -> ""})
     println(stringArray.size.toString())
 }

backend.native/tests/runtime/collections/array2.kt

@@ -0,0 +1,7 @@
+fun main(args : Array<String>) {
+    val byteArray = Array<Byte>(5, { i -> (i * 2).toByte() })
+    byteArray.map { println(it) }
+
+    val intArray = Array<Int>(5, { i -> i * 4 })
+    println(intArray.sum())
+}

backend.native/tests/runtime/collections/moderately_large_array1.kt

@@ -0,0 +1,11 @@
+fun main(args: Array<String>) {
+    val a = Array<Byte>(100000, { i -> i.toByte()})
+
+    var sum = 0
+    for (b in a) {
+        sum += b
+    }
+
+    println(sum)
+}
+