GPU Memory: allow tracing gpu_mem/gpu_mem_total on user build

Bug: 157142826
Test: enable the tracepoint on user build
Change-Id: I61560003c5cc92f2563fb98bdaee9bfd4807f46a
diff --git a/private/genfs_contexts b/private/genfs_contexts
index d0fe0d0..89232bc 100644
--- a/private/genfs_contexts
+++ b/private/genfs_contexts
@@ -296,6 +296,7 @@
 genfscon debugfs /tracing/events/task/task_rename/                                       u:object_r:debugfs_tracing:s0
 genfscon debugfs /tracing/events/task/task_newtask/                                      u:object_r:debugfs_tracing:s0
 genfscon debugfs /tracing/events/ftrace/print/                                   u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/gpu_mem/gpu_mem_total                           u:object_r:debugfs_tracing:s0
 
 genfscon debugfs /kcov								 u:object_r:debugfs_kcov:s0