Added new states to be able to better diagnose where server hangs.

- Table locks now ends with state "After table lock"
- Open table now ends with state "After opening tables"
- All calls to close_thread_tables(), not only from mysql_execute_command(), has state "closing tables"
- Added state "executing" for mysql admin commands, like CACHE INDEX, REPAIR TABLE etc.
- Added state "Finding key cache" for CACHE INDEX
- Added state "Filling schema table" when we generate temporary table for SHOW commands and information schema.

Other things:
Add limit from innobase for thread_sleep_delay. This fixed a failing tests case.
Added db.opt to support-files to make 'make package' work


mysql-test/suite/funcs_1/datadict/processlist_val.inc:
  Use new state
mysql-test/suite/funcs_1/r/processlist_priv_no_prot.result:
  Updated test result because of new state
mysql-test/suite/funcs_1/r/processlist_val_no_prot.result:
  Updated test result because of new state
sql/CMakeLists.txt:
  Have option files in support-files
sql/lock.cc:
  Added new state 'After table lock'
sql/sql_admin.cc:
  Added state "executing" and "Sending data" for mysql admin commands, like CACHE INDEX, REPAIR TABLE etc.
  Added state "Finding key cache"
sql/sql_base.cc:
  open tables now ends with state "After table lock", instead of NULL
sql/sql_parse.cc:
  Moved state "closing tables" to close_thread_tables()
sql/sql_show.cc:
  Added state "Filling schema table" when we generate temporary table for SHOW commands and information schema.
storage/xtradb/buf/buf0buf.c:
  Removed compiler warning
storage/xtradb/handler/ha_innodb.cc:
  Add limit from innobase for thread_sleep_delay. This fixed a failing tests case.
support-files/db.opt:
  cmakes needs this to create data/test directory

mysql-test/suite/funcs_1/datadict/processlist_val.inc

@@ -89,7 +89,7 @@ echo
 #   - TIME (printed value will be unified), the exact values are like
 #          "normal" load: 0 (seconds)
 #          "heavy" load: 1 or more (seconds)
-#   - State 'executing'
+#   - State 'Filling schema table'
 #   - INFO must contain the corresponding SHOW/SELECT PROCESSLIST
 #
 # 1. Just dump what we get
@@ -109,7 +109,7 @@ FROM INFORMATION_SCHEMA.PROCESSLIST WHERE ID = @default_id;
 SELECT COUNT(*)  = 1 AS "Expect 1"
 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE ID = @default_id
      AND USER = 'root' AND DB = 'test' AND Command IN('Query','Execute')
-     AND State = 'executing';
+     AND State = 'Filling schema table';
 #
 # 4. Change the DB
 USE information_schema;