forked from Imagelibrary/rtems
* itron/include/rtems/itron/task.h, itron/src/cre_tsk.c, posix/src/pthreadcreate.c, rtems/src/taskcreate.c, rtems/src/taskdelete.c, rtems/src/timerserver.c, score/src/threadclose.c, score/src/threadcreateidle.c, score/src/threadinitialize.c: Switch task create and delete operations to using API Allocator Mutex. This moves almost all uses of the RTEMS Workspace from dispatching disabled to mutex protected which should improve deterministic behavior. The implementation was carefully done to allow task create and delete extensions to invoke more services. In particular, a task delete extension should be able to do mutex and file operations.