Initialize ClassLinker from image

Change-Id: Ibaf47b4181f7c6603a8b37e2eba8fa6509c927ed
diff --git a/src/space.cc b/src/space.cc
index 8048f29..c636e38 100644
--- a/src/space.cc
+++ b/src/space.cc
@@ -100,6 +100,9 @@
     return false;
   }
   CHECK_EQ(image_header.GetBaseAddr(), map->GetAddress());
+  image_header_ = reinterpret_cast<ImageHeader*>(map->GetAddress());
+  DCHECK_EQ(0, memcmp(&image_header, image_header_, sizeof(ImageHeader)));
+
   Init(map.release());
   return true;
 }