db: extend database schema to support 256bit K and/or OP[c] values

Other UMTS AKA algorithms than MILENAGE (notably TUAK) support K sizes
of up to 256bit, or mandate a OP/OPc size of 256 bit.

Let's extend our database schema to accommodate such larger sizes.

Change-Id: Ibbde68484c904507a15c35cbfdf88cd47d0c7039
diff --git a/tests/db_upgrade/db_upgrade_test.ok b/tests/db_upgrade/db_upgrade_test.ok
index ce5b17c..c719498 100644
--- a/tests/db_upgrade/db_upgrade_test.ok
+++ b/tests/db_upgrade/db_upgrade_test.ok
@@ -86,6 +86,7 @@
 DDB Database <PATH>test.db' has been upgraded to HLR DB schema version 4
 DDB Database <PATH>test.db' has been upgraded to HLR DB schema version 5
 DDB Database <PATH>test.db' has been upgraded to HLR DB schema version 6
+DDB Database <PATH>test.db' has been upgraded to HLR DB schema version 7
 DMAIN Cmdline option --db-check: Database was opened successfully, quitting.
 
 Resulting db:
@@ -106,9 +107,9 @@
 name|type|notnull|dflt_value|pk
 algo_id_3g|INTEGER|1||0
 ind_bitlen|INTEGER|1|5|0
-k|VARCHAR(32)|1||0
-op|VARCHAR(32)|0||0
-opc|VARCHAR(32)|0||0
+k|VARCHAR(64)|1||0
+op|VARCHAR(64)|0||0
+opc|VARCHAR(64)|0||0
 sqn|INTEGER|1|0|0
 subscriber_id|INTEGER|0||1
 
@@ -179,5 +180,5 @@
 rc = 0
 DMAIN hlr starting
 DDB using database: <PATH>test.db
-DDB Database <PATH>test.db' has HLR DB schema version 6
+DDB Database <PATH>test.db' has HLR DB schema version 7
 DMAIN Cmdline option --db-check: Database was opened successfully, quitting.