gthr-dce.h (__GTHREAD_MUTEX_INIT_FUNCTION and __GTHREAD_MUTEX_INIT_DEFAULT): New macros for mutex initialization.

	* gthr-dce.h (__GTHREAD_MUTEX_INIT_FUNCTION and
	__GTHREAD_MUTEX_INIT_DEFAULT): New macros for mutex initialization.
	(__gthread_key_delete): Remove code for __PTHREAD_LIBRARY_VERSION_1 >= 1
	(__gthread_mutex_init_function): New function for mutex initialization.

From-SVN: r44614