Fix multiple inclusion guards to match new pathnames

Change-Id: Id7735be1d75bc315733b1773fba45c1deb8ace43
diff --git a/compiler/dex/arena_bit_vector.h b/compiler/dex/arena_bit_vector.h
index a950e82..0b7bbc5 100644
--- a/compiler/dex/arena_bit_vector.h
+++ b/compiler/dex/arena_bit_vector.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef ART_SRC_COMPILER_DEX_COMPILER_ARENA_BIT_VECTOR_H_
-#define ART_SRC_COMPILER_DEX_COMPILER_ARENA_BIT_VECTOR_H_
+#ifndef ART_COMPILER_DEX_ARENA_BIT_VECTOR_H_
+#define ART_COMPILER_DEX_ARENA_BIT_VECTOR_H_
 
 #include <stdint.h>
 #include <stddef.h>
@@ -124,4 +124,4 @@
 
 }  // namespace art
 
-#endif  // ART_SRC_COMPILER_DEX_COMPILER_ARENA_BIT_VECTOR_H_
+#endif  // ART_COMPILER_DEX_ARENA_BIT_VECTOR_H_