test case


heap/hp_create.c:
  auto_increment for heap tables
heap/hp_hash.c:
  auto_increment for heap tables
heap/hp_info.c:
  auto_increment for heap tables
heap/hp_test1.c:
  auto_increment for heap tables
heap/hp_test2.c:
  auto_increment for heap tables
heap/hp_update.c:
  auto_increment for heap tables
heap/hp_write.c:
  auto_increment for heap tables
include/heap.h:
  auto_increment for heap tables
mysql-test/r/create.result:
  auto_increment for heap tables
mysql-test/t/create.test:
  auto_increment for heap tables
sql/ha_heap.cc:
  auto_increment for heap tables
sql/ha_heap.h:
  auto_increment for heap tables