to return the cause of failure we have to inform MySQL using the
sql_print_warning() function to return the cause for autoinc failure.
Previously we simply printed the error code, this patch prints the
text string representing the following two error codes:

DB_LOCK_WAIT_TIMEOUT
DB_DEADLOCK.

Bug#35498 Cannot get table test/table1 auto-inccounter value in ::info

Approved by Marko.