Fix deadlock in process exit handling

runtime/bin/builtin_in.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <assert.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include "include/dart_api.h"
 
@@ skipping 22 matching lines @@
   V(File_ReadByte, 1)                                                          \
   V(File_WriteByte, 2)                                                         \
   V(File_WriteString, 2)                                                       \
   V(File_ReadList, 4)                                                          \
   V(File_WriteList , 4)                                                        \
   V(File_Position, 1)                                                          \
   V(File_Length, 1)                                                            \
   V(File_Flush, 1)                                                             \
   V(EventHandler_Start, 1)                                                     \
   V(EventHandler_SendData, 4)                                                  \
+  V(Process_Start, 8)                                                          \
   V(Process_Kill, 2)                                                           \
-  V(Process_Start, 8)                                                          \
+  V(Process_Exit, 2)                                                           \
   V(Socket_CreateConnect, 3)                                                   \
   V(Socket_Available, 1)                                                       \
   V(Socket_ReadList, 4)                                                        \
   V(Socket_WriteList, 4)                                                       \
   V(Socket_GetPort, 1)                                                         \
   V(ServerSocket_CreateBindListen, 4)                                          \
   V(ServerSocket_Accept, 2)                                                    \
 
 
 BUILTIN_NATIVE_LIST(DECLARE_FUNCTION);
@@ skipping 92 matching lines @@
 
 
 void Builtin_SetNativeResolver() {
   Dart_Handle url = Dart_NewString(DartUtils::kBuiltinLibURL);
   Dart_Result result = Dart_LookupLibrary(url);
   assert(Dart_IsValidResult(result));
   Dart_Handle builtin_lib = Dart_GetResult(result);
   result = Dart_SetNativeResolver(builtin_lib, native_lookup);
   assert(Dart_IsValidResult(result));
 }