Expose /dev/hw_random to group "system".
This is needed to let EntropyMixer (runs inside system_server) read
from /dev/hw_random.
Change-Id: Ifde851004301ffd41b2189151a64a0c5989c630f
diff --git a/rootdir/ueventd.rc b/rootdir/ueventd.rc
index 2cf0265..a60cfc5 100644
--- a/rootdir/ueventd.rc
+++ b/rootdir/ueventd.rc
@@ -5,6 +5,8 @@
/dev/tty 0666 root root
/dev/random 0666 root root
/dev/urandom 0666 root root
+# Make HW RNG readable by group system to let EntropyMixer read it.
+/dev/hw_random 0440 root system
/dev/ashmem 0666 root root
/dev/binder 0666 root root