Allow for longer entries in the system.information column

Switch from VARCHAR(128) to TEXT to allow for longer entries in the
information column.  On server registration, this column is typically
loaded with the output of ```uname -a```.  That's frequently longer than
128 characters.  For instance on the FreeBSD servers I manage, it's
typically in excess of 180 characters:

```
ox-dell39:~:% uname -a | wc
       1      15     185
```

Since the length of the data being written to that column is not
checked, this results in a failed SQL query at which the ossec-dbd
process quits.

Tested with postgresql; equivalent change applied to mysql.schema
but not tested.

src/os_dbd/mysql.schema

@@ -39,7 +39,7 @@ CREATE TABLE IF NOT EXISTS  server
     last_contact    INT         UNSIGNED NOT NULL,
     version         VARCHAR(32)          NOT NULL,
     hostname        VARCHAR(64)          NOT NULL   UNIQUE,
-    information     VARCHAR(128)         NOT NULL,
+    information     TEXT                 NOT NULL,
     PRIMARY KEY  (id)
     );
 

src/os_dbd/postgresql.schema

@@ -41,7 +41,7 @@ CREATE TABLE server
     last_contact    INT8                 NOT NULL,
     version         VARCHAR(32)          NOT NULL,
     hostname        VARCHAR(64)          NOT NULL   UNIQUE,
-    information     VARCHAR(128)         NOT NULL,
+    information     TEXT                 NOT NULL,
     PRIMARY KEY  (id)
     );