libosmocoding.map: export gsm0503_tch_hr_decode2()

In commit 57a3b3a51fff I added new function gsm0503_tch_hr_decode2(),
but I forgot to add it to libosmocoding.map - and without the latter,
osmo-bts-trx and other applications can't use the new function.
Fix that omission.

Related: OS#5688
Change-Id: I6e75ca95409b5c368e8e04d0e0aba41e0331d9e6
---
M src/coding/libosmocoding.map
1 file changed, 16 insertions(+), 0 deletions(-)

diff --git a/src/coding/libosmocoding.map b/src/coding/libosmocoding.map
index ff6ea80..a78da27 100644
--- a/src/coding/libosmocoding.map
+++ b/src/coding/libosmocoding.map
@@ -107,6 +107,7 @@
 gsm0503_tch_fr_decode;
 gsm0503_tch_hr_encode;
 gsm0503_tch_hr_decode;
+gsm0503_tch_hr_decode2;
 gsm0503_tch_afs_encode;
 gsm0503_tch_afs_decode;
 gsm0503_tch_afs_decode_dtx;

