gprs_ns2: add gprs_ns2_ip_bind_by_sockaddr() to search for binds by sockaddr

Change-Id: I48c3f1a82574eee0a49e6941cf9e1365c2302d3b
diff --git a/src/gb/libosmogb.map b/src/gb/libosmogb.map
index d08e85e..980b317 100644
--- a/src/gb/libosmogb.map
+++ b/src/gb/libosmogb.map
@@ -84,6 +84,7 @@
 gprs_ns2_frgre_bind;
 gprs_ns2_instantiate;
 gprs_ns2_ip_bind;
+gprs_ns2_ip_bind_by_sockaddr;
 gprs_ns2_ip_bind_set_dscp;
 gprs_ns2_ip_bind_sockaddr;
 gprs_ns2_ip_connect;