Problem:
--------

The --print-log option of ndb_restore does not produce
valid SQL statements.

Fix:
----

Introduced a new option --print-sql-log which produces usable
SQL statements. This option has the following constraints:

1. All the tables being restored must have explicitly defined primary
   keys. This is due to the fact that queries fired on tables with
   'hidden' primary keys are logged in a manner such that they cannot
   be converted to valid SQL
2. Only one of the --print-sql-log and --print-log options can be
   passed as parameters during a restore
3. The tables being restored must not have columns of type blob