Make common BitVector operations inline-able.

Change-Id: Ie25de4fae56c6712539f04172c42e3eff57df7ca
diff --git a/compiler/dex/mir_graph.cc b/compiler/dex/mir_graph.cc
index dee1361..16b529a 100644
--- a/compiler/dex/mir_graph.cc
+++ b/compiler/dex/mir_graph.cc
@@ -19,6 +19,7 @@
 #include <inttypes.h>
 #include <queue>
 
+#include "base/bit_vector-inl.h"
 #include "base/stl_util.h"
 #include "compiler_internals.h"
 #include "dex_file-inl.h"