manta: add init files for manta boards

Add init.manta.rc, init.manta.usb.rc, and ueventd.manta.rc

Change-Id: I47bcd8546470a04f7c9f1403ae86e9f89f0ad63b
diff --git a/ueventd.manta.rc b/ueventd.manta.rc
new file mode 100644
index 0000000..320e528
--- /dev/null
+++ b/ueventd.manta.rc
@@ -0,0 +1,4 @@
+/dev/mali0                0666   system     system
+/dev/ump                  0666   system     system
+/dev/ion                  0666   system     system
+