usbd sepolicy

Sepolicy for the usb daemon. (ag/3373886/)

Bug: 63669128
Test: Checked for avc denial messages.
Change-Id: I6e2a4ccf597750c47e1ea90c4d43581de4afa4af
diff --git a/private/file_contexts b/private/file_contexts
index 98552a3..8dfec78 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -240,6 +240,7 @@
 /system/bin/healthd     u:object_r:healthd_exec:s0
 /system/bin/clatd	u:object_r:clatd_exec:s0
 /system/bin/lmkd        u:object_r:lmkd_exec:s0
+/system/bin/usbd   u:object_r:usbd_exec:s0
 /system/bin/inputflinger u:object_r:inputflinger_exec:s0
 /system/bin/logd        u:object_r:logd_exec:s0
 /system/bin/traced        u:object_r:traced_exec:s0