Add kotlin.external annotation and deprecate kotlin.jvm.native

compiler/testData/codegen/boxWithStdlib/fullJdk/native/default.kt

@@ -4,12 +4,12 @@ import kotlin.jvm.*
 import kotlin.platform.*
 
 object ObjWithNative {
-    native fun foo(x: Int = 1): Double
+    external fun foo(x: Int = 1): Double
 
-    platformStatic native fun bar(l: Long, s: String = ""): Double
+    platformStatic external fun bar(l: Long, s: String = ""): Double
 }
 
-native fun topLevel(x: Int = 1): Double
+external fun topLevel(x: Int = 1): Double
 
 fun box(): String {
     var d = 0.0

compiler/testData/codegen/boxWithStdlib/fullJdk/native/nativePropertyAccessors.kt

@@ -1,27 +1,27 @@
 class C {
     companion object {
         val defaultGetter: Int = 1
-            @native get
+            @external get
 
         var defaultSetter: Int = 1
-            @native get
-            @native set
+            @external get
+            @external set
     }
 
     val defaultGetter: Int = 1
-        @native get
+        @external get
 
     var defaultSetter: Int = 1
-        @native get
-        @native set
+        @external get
+        @external set
 }
 
 val defaultGetter: Int = 1
-    @native get
+    @external get
 
 var defaultSetter: Int = 1
-    @native get
-    @native set
+    @external get
+    @external set
 
 fun check(body: () -> Unit, signature: String): String? {
     try {

compiler/testData/codegen/boxWithStdlib/fullJdk/native/privateStatic.kt

@@ -3,7 +3,7 @@ import kotlin.platform.*
 
 class C {
     companion object {
-        private platformStatic native fun foo()
+        private platformStatic external fun foo()
     }
 
     fun bar() {

compiler/testData/codegen/boxWithStdlib/fullJdk/native/simpleNative.kt

@@ -3,7 +3,7 @@ package foo
 import kotlin.jvm.*
 
 class WithNative {
-    native fun foo()
+    external fun foo()
 }
 
 fun box(): String {

compiler/testData/codegen/boxWithStdlib/fullJdk/native/staticNative.kt

@@ -5,12 +5,12 @@ import kotlin.platform.*
 
 class WithNative {
     companion object {
-        platformStatic native fun bar(l: Long, s: String): Double
+        platformStatic external fun bar(l: Long, s: String): Double
     }
 }
 
 object ObjWithNative {
-    platformStatic native fun bar(l: Long, s: String): Double
+    platformStatic external fun bar(l: Long, s: String): Double
 }
 
 fun box(): String {

compiler/testData/codegen/boxWithStdlib/fullJdk/native/topLevel.kt

@@ -3,7 +3,7 @@ package foo
 import kotlin.jvm.*
 import kotlin.platform.*
 
-native fun bar(l: Long, s: String): Double
+external fun bar(l: Long, s: String): Double
 
 fun box(): String {
     var d = 0.0