Review feedback on previous changes. (#64)

backend.native/tests/build.gradle

@@ -194,7 +194,7 @@ task hello3(type: RunKonanTest) {
 }
 
 task tostring0(type: RunKonanTest) {
-    goldValue = "127\n255\n239\nA\n1122334455\n112233445566778899\n1E+27\n1E-300\ntrue\nfalse\n"
+    goldValue = "127\n-1\n239\nA\n1122334455\n112233445566778899\n1E+27\n1E-300\ntrue\nfalse\n"
     source = "runtime/basic/tostring0.kt"
 }
 
@@ -212,7 +212,7 @@ task array0(type: RunKonanTest) {
 task array1(type: RunKonanTest) {
     goldValue = "42\n1-1\n69\n83\n"
     source = "runtime/basic/array1.kt"
-    }*/
+}*/
 
 
 task if_else(type: UnitKonanTest) {

backend.native/tests/runtime/basic/tostring0.kt

@@ -7,6 +7,9 @@ fun main(args : Array<String>) {
     // println('ト'.toString())
     println(1122334455.toString())
     println(112233445566778899.toString())
+    // Here we differ from Java, as have no dtoa() yet.
+    println(3.14159265358.toString())
+    // Here we differ from Java, as have no dtoa() yet.
     println(1e27.toFloat().toString())
     println(1e-300.toDouble().toString())
     println(true.toString())