libosmocore.map: add tall_{ctr/msgb}_ctx

These should not be used, but add them for backwards compatibility with
building older versions of osmo-bsc, osmo-iuh, osmo-pcap against current
libosmocore.

Fixes: 213fc420 ("Add libosmocore.map")
Change-Id: I4cfccf3622844d0923818bb8d8ce206f70e44a0d
diff --git a/src/core/libosmocore.map b/src/core/libosmocore.map
index 16b7261..984046b 100644
--- a/src/core/libosmocore.map
+++ b/src/core/libosmocore.map
@@ -559,7 +559,9 @@
 rb_replace_node;
 sercomm_drv_lock;
 sercomm_drv_unlock;
+tall_ctr_ctx; /* deprecated */
 tall_log_ctx;
+tall_msgb_ctx; /* deprecated */
 
 local: *;
 };