Move ArrayRef to runtime/base

Will be used in upcoming CLs regarding VDEX and VerifierDeps.

Test: m test-art-host
Change-Id: I68e611a4a52246c2bdf45eab7c61f3212908afd4
diff --git a/compiler/debug/elf_debug_writer.h b/compiler/debug/elf_debug_writer.h
index b0542c7..07f7229 100644
--- a/compiler/debug/elf_debug_writer.h
+++ b/compiler/debug/elf_debug_writer.h
@@ -19,11 +19,11 @@
 
 #include <vector>
 
+#include "base/array_ref.h"
 #include "base/macros.h"
 #include "base/mutex.h"
 #include "debug/dwarf/dwarf_constants.h"
 #include "elf_builder.h"
-#include "utils/array_ref.h"
 
 namespace art {
 class OatHeader;