mysqldump view support (BUG#4972)
workaround to allow view work after LOCK TABLES


client/mysqldump.c:
  view support
mysql-test/r/lowercase_view.result:
  new show create view output
mysql-test/r/view.result:
  new show create view output
  test of locked views
mysql-test/t/view.test:
  new show create view output
  test of locked views
sql/sql_base.cc:
  workaround to allow view work after LOCK TABLES
sql/sql_show.cc:
  new show create view output (to help mysql dump detect views)