* posix/tst-regex.c: Use defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0

	* posix/tst-regex.c: Use defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
	conditionals instead of defined _POSIX_CPUTIME.
	(main): If _POSIX_CPUTIME == 0, call sysconf to see if CPUTIME
	option is available.
	* posix/tst-regex.c2: Use defined _POSIX_CPUTIME && _POSIX_CPUTIME >= 0
	conditionals instead of defined _POSIX_CPUTIME.
	(do_test): If _POSIX_CPUTIME == 0, call sysconf to see if CPUTIME
	option is available.
	* sysdeps/posix/sysconf.c (__sysconf): If _POSIX_CPUTIME resp.
	_POSIX_THREAD_CPUTIME is defined to 0, return -1 for the corresponding
	_SC_ argument.
nptl/
	* sysdeps/unix/sysv/linux/bits/posix_opt.h (_POSIX_CPUTIME,
	_POSIX_THREAD_CPUTIME): Define to 0.
	* sysdeps/pthread/timer_create.c (timer_create): Remove unused code
	handling CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID.
	* sysdeps/pthread/timer_routines.c (__timer_signal_thread_pclk,
	__timer_signal_thread_tclk): Remove.
	(init_module): Remove their initialization.
	(thread_cleanup): Remove their cleanup assertions.
	* sysdeps/pthread/posix-timer.h (__timer_signal_thread_pclk,
	__timer_signal_thread_tclk): Remove.
	* sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Removed.
	* sysdeps/unix/sysv/linux/ia64/bits/posix_opt.h: Removed.
	* sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h: Removed.
linuxthreads/
	* sysdeps/unix/sysv/linux/bits/posix_opt.h (_POSIX_CPUTIME,
	_POSIX_THREAD_CPUTIME): Define to 0.
	* sysdeps/pthread/timer_create.c (timer_create): Remove unused code
	handling CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID.
	* sysdeps/pthread/timer_routines.c (__timer_signal_thread_pclk,
	__timer_signal_thread_tclk): Remove.
	(init_module): Remove their initialization.
	(thread_cleanup): Remove their cleanup assertions.
	* sysdeps/pthread/posix-timer.h (__timer_signal_thread_pclk,
	__timer_signal_thread_tclk): Remove.
	* sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Removed.
	* sysdeps/unix/sysv/linux/ia64/bits/posix_opt.h: Removed.
	* sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h: Removed.