charge the permissions for the proc/bootconfig

The current/proc/bootconfig node is the root user group,but some Android modules of our company do not have permission to access the root user group node. We want to add the same permissions to /proc/cmdline for the proc/bootconfig node in init.rc

Change-Id: I98f63a09cf7306be65c40674b1b28f1153c705fb
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 70a3736..29b8365 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -1170,6 +1170,7 @@
     chown system system /sys/kernel/ipv4/tcp_rmem_def
     chown system system /sys/kernel/ipv4/tcp_rmem_max
     chown root radio /proc/cmdline
+    chown root system /proc/bootconfig
 
     # Define default initial receive window size in segments.
     setprop net.tcp_def_init_rwnd 60