LEAK WITH PARTITIONED ARCHIVE TABLES

CHECK TABLE against archive table, when file descriptors
are exhausted, caused server crash.

Archive didn't handle errors when opening data file for
CHECK TABLE.

mysql-test/r/archive_debug.result:
  A test case for BUG#12402794.
mysql-test/t/archive_debug.test:
  A test case for BUG#12402794.
storage/archive/azio.c:
  A test case for BUG#12402794.
storage/archive/ha_archive.cc:
  Handle init_archive_reader() failure.