This makes the keys smaller (no row pointer) and gives us proper errors if we
use the table wrongly.

sql/sql_select.cc:
  Use NO_RECORD for tables that doesn't need row data.
storage/maria/Makefile.am:
  Added ma_norec.c
storage/maria/ma_check.c:
  Added support for NO_RECORD record format (don't store any row data)
storage/maria/ma_norec.c:
  Added support for NO_RECORD record format
storage/maria/ma_open.c:
  Added support for NO_RECORD record format
storage/maria/ma_search.c:
  Added support for 0 size row pointers (used with NO_RECORD)
storage/maria/ma_test1.c:
  Added testing of NO_RECORD record format.
storage/maria/maria_chk.c:
  Added support for NO_RECORD
storage/maria/maria_def.h:
  Added support for NO_RECORD
storage/maria/unittest/ma_test_all-t:
  Added testing of NO_RECORD record format