Add an IP_RECVTOS OsConstant

Change-Id: I70f5b8c0755448c498e8c3bc9e07003bcd23b8b8
diff --git a/luni/src/main/java/android/system/OsConstants.java b/luni/src/main/java/android/system/OsConstants.java
index 08a0ba8..3a24856 100644
--- a/luni/src/main/java/android/system/OsConstants.java
+++ b/luni/src/main/java/android/system/OsConstants.java
@@ -310,6 +310,7 @@
     public static final int IP_MULTICAST_IF = placeholder();
     public static final int IP_MULTICAST_LOOP = placeholder();
     public static final int IP_MULTICAST_TTL = placeholder();
+    /** @hide */ public static final int IP_RECVTOS = placeholder();
     public static final int IP_TOS = placeholder();
     public static final int IP_TTL = placeholder();
     public static final int MAP_FIXED = placeholder();
diff --git a/luni/src/main/native/android_system_OsConstants.cpp b/luni/src/main/native/android_system_OsConstants.cpp
index 074bbef..fb912a7 100644
--- a/luni/src/main/native/android_system_OsConstants.cpp
+++ b/luni/src/main/native/android_system_OsConstants.cpp
@@ -330,6 +330,7 @@
     initConstant(env, c, "IP_MULTICAST_IF", IP_MULTICAST_IF);
     initConstant(env, c, "IP_MULTICAST_LOOP", IP_MULTICAST_LOOP);
     initConstant(env, c, "IP_MULTICAST_TTL", IP_MULTICAST_TTL);
+    initConstant(env, c, "IP_RECVTOS", IP_RECVTOS);
     initConstant(env, c, "IP_TOS", IP_TOS);
     initConstant(env, c, "IP_TTL", IP_TTL);
     initConstant(env, c, "MAP_FIXED", MAP_FIXED);