Add strings with PH primitive names

It's useful debugging helper while troubleshooting L1-related issues.

Change-Id: Id7a6d478fd725c51f54ad746bdf9b9095579ff77
Reviewed-on: https://gerrit.osmocom.org/117
Tested-by: Jenkins Builder
Reviewed-by: Max <msuraev@sysmocom.de>
Reviewed-by: Holger Freyther <holger@freyther.de>
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 1e2d323..301f5aa 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -223,6 +223,8 @@
 lapdm_phsap_up;
 lapdm_rslms_recvmsg;
 
+osmo_ph_prim_names;
+
 milenage_auts;
 milenage_check;
 milenage_f1;