ART: Use .bss section for dex cache arrays.

Change-Id: I5fd507973b56f6a662a02a8c1dd9ac4493fb7b36
diff --git a/runtime/utils/dex_cache_arrays_layout.h b/runtime/utils/dex_cache_arrays_layout.h
index d50be5a..cd84460 100644
--- a/runtime/utils/dex_cache_arrays_layout.h
+++ b/runtime/utils/dex_cache_arrays_layout.h
@@ -17,6 +17,8 @@
 #ifndef ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
 #define ART_RUNTIME_UTILS_DEX_CACHE_ARRAYS_LAYOUT_H_
 
+#include "dex_file.h"
+
 namespace art {
 
 /**
@@ -36,6 +38,9 @@
         size_(0u) {
   }
 
+  // Construct a layout for a particular dex file header.
+  DexCacheArraysLayout(size_t pointer_size, const DexFile::Header& header);
+
   // Construct a layout for a particular dex file.
   DexCacheArraysLayout(size_t pointer_size, const DexFile* dex_file);