Export comp128 v2 and v3 routines as well

It is in the public header file and allows to easily bind it from
other languages (without having to go through the abstraction).

Change-Id: I0128d529c52ec030cfb87b0aff3c69cadf2c59d2
diff --git a/src/gsm/libosmogsm.map b/src/gsm/libosmogsm.map
index 78e55df..5f2fb8f 100644
--- a/src/gsm/libosmogsm.map
+++ b/src/gsm/libosmogsm.map
@@ -34,6 +34,8 @@
 osmo_c4;
 bitvec_add_range1024;
 comp128;
+comp128v2;
+comp128v3;
 dbm2rxlev;
 
 osmo_earfcn_add;