and a bug fix for derived tables


include/thr_lock.h:
  changes for mysqladmin debug
mysys/thr_lock.c:
  changes for mysqladmin debug
sql/lock.cc:
  changes for mysqladmin debug
sql/sql_derived.cc:
  bug fix for derived ..
sql/sql_parse.cc:
  bug fix for derived
sql/sql_test.cc:
  changes for mysqladmin debug