Initial support to test.dart for running precompiler tests on android devices

runtime/bin/log_android.cc

 // 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_ANDROID)
 
 #include "bin/log.h"
 
 #include <android/log.h>  // NOLINT
 #include <stdio.h>  // NOLINT
 
 namespace dart {
 namespace bin {
 
 // TODO(gram): We should be buffering the data and only outputting
 // it when we see a '\n'.
 
 void Log::VPrint(const char* format, va_list args) {
+  // If we launch the DartVM inside "adb shell" we will only get messages
+  // (critical ones or not) if we print them to stdout/stderr.
+  // We also log using android's logging system.
+  vprintf(format, args);
   __android_log_vprint(ANDROID_LOG_INFO, "Dart", format, args);
 }
 
 void Log::VPrintErr(const char* format, va_list args) {
+  // If we launch the DartVM inside "adb shell" we will only get messages
+  // (critical ones or not) if we print them to stdout/stderr.
+  // We also log using android's logging system.
+  vfprintf(stderr, format, args);
   __android_log_vprint(ANDROID_LOG_ERROR, "Dart", format, args);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_ANDROID)