Fix multiple inclusion guards to match new pathnames

Change-Id: Id7735be1d75bc315733b1773fba45c1deb8ace43
diff --git a/runtime/gc/accounting/mod_union_table-inl.h b/runtime/gc/accounting/mod_union_table-inl.h
index 656af94..32ac95f 100644
--- a/runtime/gc/accounting/mod_union_table-inl.h
+++ b/runtime/gc/accounting/mod_union_table-inl.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef ART_SRC_GC_MOD_UNION_TABLE_INL_H_
-#define ART_SRC_GC_MOD_UNION_TABLE_INL_H_
+#ifndef ART_RUNTIME_GC_ACCOUNTING_MOD_UNION_TABLE_INL_H_
+#define ART_RUNTIME_GC_ACCOUNTING_MOD_UNION_TABLE_INL_H_
 
 #include "mod_union_table.h"
 
@@ -72,4 +72,4 @@
 }  // namespace gc
 }  // namespace art
 
-#endif  // ART_SRC_GC_MOD_UNION_TABLE_INL_H_
+#endif  // ART_RUNTIME_GC_ACCOUNTING_MOD_UNION_TABLE_INL_H_