e1input: add address as parameter to e1inp_line_update(...)

This patch adds a new parameter to e1inp_line_update that allows to
specific the address for A-bis over IP BSC/BTS.
diff --git a/tests/e1inp_ipa_bsc_test.c b/tests/e1inp_ipa_bsc_test.c
index 6c1cacc..3dfbc54 100644
--- a/tests/e1inp_ipa_bsc_test.c
+++ b/tests/e1inp_ipa_bsc_test.c
@@ -76,7 +76,7 @@
 	 * it explains how this is done with ISDN.
 	 */
 
-	if (e1inp_line_update(line, E1INP_LINE_R_BSC) < 0) {
+	if (e1inp_line_update(line, E1INP_LINE_R_BSC, "0.0.0.0") < 0) {
 		LOGP(DBSCTEST, LOGL_ERROR, "problem creating E1 line\n");
 		exit(EXIT_FAILURE);
 	}