Add _android files for building DartVM on Android

runtime/platform/globals.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 PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 34 matching lines @@
 
 #if defined(_WIN32)
 #include "platform/c99_support_win.h"
 #include "platform/inttypes_support_win.h"
 #endif
 
 // Target OS detection.
 // for more information on predefined macros:
 //   - http://msdn.microsoft.com/en-us/library/b0084kay.aspx
 //   - with gcc, run: "echo | gcc -E -dM -"
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(__ANDROID__)
+#define TARGET_OS_ANDROID
+#elif defined(__linux__) || defined(__FreeBSD__)
 #define TARGET_OS_LINUX 1
 #elif defined(__APPLE__)
 #define TARGET_OS_MACOS 1
 #elif defined(_WIN32)
 #define TARGET_OS_WINDOWS 1
 #else
 #error Automatic target os detection failed.
 #endif
 
 // Processor architecture detection.  For more info on what's defined, see:
@@ skipping 252 matching lines @@
          sizeof(destination));
   return destination;
 }
 
 
 // A macro to ensure that memcpy cannot be called. memcpy does not handle
 // overlapping memory regions. Even though this is well documented it seems
 // to be used in error quite often. To avoid problems we disallow the direct
 // use of memcpy here.
 //
-// On Windows the basic libraries use memcpy and therefore compilation will
-// fail if memcpy is overwritten even if user code does not use memcpy.
+// On Android and Windows the basic libraries use memcpy and therefore
+// compilation will fail if memcpy is overwritten even if user code does not
+// use memcpy.
 #if defined(memcpy)
 #undef memcpy
 #endif
-#if !defined(TARGET_OS_WINDOWS)
+#if !( defined(TARGET_OS_ANDROID) || defined(TARGET_OS_WINDOWS) )
 #define memcpy "Please use memmove instead of memcpy."
 #endif
 
 
 // On Windows the reentrent version of strtok is called
 // strtok_s. Unify on the posix name strtok_r.
 #if defined(TARGET_OS_WINDOWS)
 #define snprintf _snprintf
 #define strtok_r strtok_s
 #endif
 
 #if !defined(TARGET_OS_WINDOWS) && !defined(TEMP_FAILURE_RETRY)
 // TEMP_FAILURE_RETRY is defined in unistd.h on some platforms. The
 // definition below is copied from Linux and adapted to avoid lint
 // errors (type long int changed to int64_t and do/while split on
 // separate lines with body in {}s).
 # define TEMP_FAILURE_RETRY(expression)                                        \
     ({ int64_t __result;                                                       \
        do {                                                                    \
          __result = (int64_t) (expression);                                    \
        } while (__result == -1L && errno == EINTR);                            \
        __result; })
 #endif
 
 #endif  // PLATFORM_GLOBALS_H_