Make common BitVector operations inline-able.

Change-Id: Ie25de4fae56c6712539f04172c42e3eff57df7ca
diff --git a/compiler/dex/mir_optimization.cc b/compiler/dex/mir_optimization.cc
index c7dd85c..6658848 100644
--- a/compiler/dex/mir_optimization.cc
+++ b/compiler/dex/mir_optimization.cc
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include "base/bit_vector-inl.h"
 #include "compiler_internals.h"
 #include "global_value_numbering.h"
 #include "local_value_numbering.h"