soft_uart: add osmo_soft_uart_{get,set}_name()

Change-Id: Iabf29f42d876035481011fa8e8a51c0590fe63b8
Related: OS#4396
diff --git a/src/core/libosmocore.map b/src/core/libosmocore.map
index 3d6aa42..4ae5108 100644
--- a/src/core/libosmocore.map
+++ b/src/core/libosmocore.map
@@ -444,6 +444,8 @@
 osmo_soft_uart_alloc;
 osmo_soft_uart_free;
 osmo_soft_uart_configure;
+osmo_soft_uart_get_name;
+osmo_soft_uart_set_name;
 osmo_soft_uart_set_rx;
 osmo_soft_uart_set_tx;
 osmo_soft_uart_rx_ubits;