Return a null Platform.executable and resolvedExecutable on Android

runtime/bin/platform.h

 // Copyright (c) 2012, 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.
 
 #ifndef BIN_PLATFORM_H_
 #define BIN_PLATFORM_H_
 
 #include "bin/builtin.h"
 #include "platform/globals.h"
 
@@ skipping 51 matching lines @@
   // Stores the executable name.
   static void SetExecutableName(const char* executable_name) {
     executable_name_ = executable_name;
   }
   static const char* GetExecutableName() {
     return executable_name_;
   }
   static const char* GetResolvedExecutableName() {
     if (resolved_executable_name_ == NULL) {
       // Try to resolve the executable path using platform specific APIs.
-      resolved_executable_name_ = strdup(Platform::ResolveExecutablePath());
+      const char* resolved_name = Platform::ResolveExecutablePath();
+      if (resolved_name != NULL) {
+        resolved_executable_name_ = strdup(resolved_name);
+      }
     }
     return resolved_executable_name_;
   }
 
   // Stores and gets the flags passed to the executable.
   static void SetExecutableArguments(int script_index, char** argv) {
     script_index_ = script_index;
     argv_ = argv;
   }
   static int GetScriptIndex() {
@@ skipping 15 matching lines @@
   static char** argv_;  // VM flags are argv_[1 ... script_index_ - 1]
 
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Platform);
 };
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // BIN_PLATFORM_H_