Fuchsia: Make fuchsia_test use snapshots

runtime/vm/os_fuchsia.cc

 // Copyright (c) 2016, 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 "vm/globals.h"
 #if defined(TARGET_OS_FUCHSIA)
 
 #include "vm/os.h"
 
 #include <errno.h>
@@ skipping 149 matching lines @@
   UNIMPLEMENTED();
 }
 
 
 void OS::DebugBreak() {
   UNIMPLEMENTED();
 }
 
 
 char* OS::StrNDup(const char* s, intptr_t n) {
-  UNIMPLEMENTED();
-  return NULL;
+  return strndup(s, n);
 }
 
 
 intptr_t OS::StrNLen(const char* s, intptr_t n) {
-  UNIMPLEMENTED();
-  return 0;
+  return strnlen(s, n);
 }
 
 
 void OS::Print(const char* format, ...) {
-  UNIMPLEMENTED();
+  va_list args;
+  va_start(args, format);
+  VFPrint(stdout, format, args);
+  va_end(args);
 }
 
 
 void OS::VFPrint(FILE* stream, const char* format, va_list args) {
   vfprintf(stream, format, args);
   fflush(stream);
 }
 
 
 int OS::SNPrint(char* str, size_t size, const char* format, ...) {
@@ skipping 102 matching lines @@
 }
 
 
 void OS::Exit(int code) {
   UNIMPLEMENTED();
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_FUCHSIA)