fix cpp11 compile errors

runtime/vm/zone.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 "vm/zone.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/flags.h"
 #include "vm/handles_impl.h"
@@ skipping 96 matching lines @@
     size += s->size();
   }
   return size + (position_ - head_->start());
 }
 
 
 uword Zone::AllocateExpand(intptr_t size) {
 #if defined(DEBUG)
   ASSERT(size >= 0);
   if (FLAG_trace_zones) {
-    OS::PrintErr("*** Expanding zone 0x%"Px"\n",
+    OS::PrintErr("*** Expanding zone 0x%" Px "\n",
                  reinterpret_cast<intptr_t>(this));
     DumpZoneSizes();
   }
   // Make sure the requested size is already properly aligned and that
   // there isn't enough room in the Zone to satisfy the request.
   ASSERT(Utils::IsAligned(size, kAlignment));
   intptr_t free_size = (limit_ - position_);
   ASSERT(free_size <  size);
 #endif
 
@@ skipping 44 matching lines @@
   return copy;
 }
 
 
 #if defined(DEBUG)
 void Zone::DumpZoneSizes() {
   intptr_t size = 0;
   for (Segment* s = large_segments_; s != NULL; s = s->next()) {
     size += s->size();
   }
-  OS::PrintErr("***   Zone(0x%"Px") size in bytes,"
-               " Total = %"Pd" Large Segments = %"Pd"\n",
+  OS::PrintErr("***   Zone(0x%" Px ") size in bytes,"
+               " Total = %" Pd " Large Segments = %" Pd "\n",
                reinterpret_cast<intptr_t>(this), SizeInBytes(), size);
 }
 #endif
 
 
 void Zone::VisitObjectPointers(ObjectPointerVisitor* visitor) {
   Zone* zone = this;
   while (zone != NULL) {
     zone->handles()->VisitObjectPointers(visitor);
     zone = zone->previous_;
@@ skipping 11 matching lines @@
   va_list args2;
   va_start(args2, format);
   OS::VSNPrint(buffer, (len + 1), format, args2);
   va_end(args2);
 
   return buffer;
 }
 
 
 }  // namespace dart