Allow heapprofd to read test files.

This is needed to test the unwinding of test binaries.

03-26 19:55:44.311   939   939 W heapprofd: type=1400 audit(0.0:13): avc: denied { search } for name="nativetest" dev="sda45" ino=6815745 scontext=u:r:heapprofd:s0 tcontext=u:object_r:nativetest_data_file:s0 tclass=dir permissive=0

Change-Id: Icfbc6060a8755934f1c3935aac55ce7792dc7d85
diff --git a/private/heapprofd.te b/private/heapprofd.te
index 98645a2..5330c58 100644
--- a/private/heapprofd.te
+++ b/private/heapprofd.te
@@ -42,6 +42,7 @@
 # When handling profiling for all processes, heapprofd needs to read
 # executables/libraries/etc to do stack unwinding.
 userdebug_or_eng(`
+  r_dir_file(heapprofd, nativetest_data_file)
   r_dir_file(heapprofd, system_file_type)
   r_dir_file(heapprofd, apk_data_file)
   r_dir_file(heapprofd, dalvikcache_data_file)