FN_NO_CASE_SENCE used instead of __WIN__ in table name handling of quary cache


mysql-test/r/query_cache.result:
  query cache with system database test
mysql-test/t/query_cache.test:
  query cache with system database test
sql/sql_cache.cc:
  fixed query cache with system database
  FN_NO_CASE_SENCE used instead of __WIN__