gsm0408_test: also test gsm48_generate_lai() and gsm48_decode_lai()

Change-Id: Idd6cee090464bc92b654332904a9a08edf16e5c9
diff --git a/tests/gsm0408/gsm0408_test.ok b/tests/gsm0408/gsm0408_test.ok
index dc19eea..7612c12 100644
--- a/tests/gsm0408/gsm0408_test.ok
+++ b/tests/gsm0408/gsm0408_test.ok
@@ -22,3 +22,19 @@
 MCC+MNC in BCD: 99 99 99 
 999-999-65535-255
 RA test...passed
+- gsm48_generate_lai() from 077-121-666-0
+  Encoded 70 17 21 02 9a 
+  gsm48_decode_lai() gives  077-121-666-0
+  passed
+- gsm48_generate_lai() from 084-98-11-0
+  Encoded 80 f4 89 00 0b 
+  gsm48_decode_lai() gives  084-98-11-0
+  passed
+- gsm48_generate_lai() from 000-00-0-0
+  Encoded 00 f0 00 00 00 
+  gsm48_decode_lai() gives  000-00-0-0
+  passed
+- gsm48_generate_lai() from 999-999-65535-0
+  Encoded 99 99 99 ff ff 
+  gsm48_decode_lai() gives  999-999-65535-0
+  passed