Change permissions on pppd-ril

On devices that use a pppd for cellular network access, a pppd-ril
process needs to run as root to configure the connection.  Changing
the process to suid-root in the build image is the only known way
to avoid needing to remount the system image at boot to accomplish
the same thing.

Change-Id: I6c778391b8040ee818343e304891e7d341cc729b
diff --git a/include/private/android_filesystem_config.h b/include/private/android_filesystem_config.h
index 49fa912..f2a5fe1 100644
--- a/include/private/android_filesystem_config.h
+++ b/include/private/android_filesystem_config.h
@@ -176,6 +176,7 @@
     { 06755, AID_ROOT,      AID_ROOT,      "system/xbin/procrank" },
     { 06755, AID_ROOT,      AID_ROOT,      "system/xbin/procmem" },
     { 06755, AID_ROOT,      AID_ROOT,      "system/xbin/tcpdump" },
+    { 04770, AID_ROOT,      AID_RADIO,     "system/bin/pppd-ril" },
     { 00755, AID_ROOT,      AID_SHELL,     "system/bin/*" },
     { 00755, AID_ROOT,      AID_SHELL,     "system/xbin/*" },
     { 00750, AID_ROOT,      AID_SHELL,     "sbin/*" },