Allow debuggerd to access native tests

Test: run a gtest in /data/nativetest/ with no permission denial
Change-Id: Id644ed7dbea59becaf84b6073c9144711ad07c10
diff --git a/private/file_contexts b/private/file_contexts
index 4251f92..4d2464a 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -300,6 +300,7 @@
 /data/media(/.*)?	u:object_r:media_rw_data_file:s0
 /data/mediadrm(/.*)?	u:object_r:media_data_file:s0
 /data/nativetest(/.*)?	u:object_r:nativetest_data_file:s0
+/data/nativetest64(/.*)?	u:object_r:nativetest_data_file:s0
 /data/property(/.*)?	u:object_r:property_data_file:s0
 /data/preloads(/.*)?	u:object_r:preloads_data_file:s0