Add in6addr_any and in6addr_loopback symbols.

Change-Id: I3a90fa448b6bd43321672ba74b84a4e9e8a67738
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index dd0b9c0..b87a5e3 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1266,6 +1266,8 @@
     getifaddrs;
     if_freenameindex;
     if_nameindex;
+    in6addr_any;
+    in6addr_loopback;
     lockf;
     lockf64;
     preadv;