Server crashes when accessing ARCHIVE table with missing
.ARZ file.

When opening a table, ARCHIVE didn't properly pass through
error code from lower level azopen() to higher level open()
method.

mysql-test/r/archive.result:
  A test case for BUG#48757.
mysql-test/t/archive.test:
  A test case for BUG#48757.
storage/archive/ha_archive.cc:
  Pass through error code from azopen().