Alpha: Convert fork.c to arch-fork.h
Fix some termios.h conformtest failures on sparc.

	* sysdeps/unix/sysv/linux/sparc/bits/termios.h (PAGEOUT, WRAP):
	Protect with __USE_GNU.
	(TIOCSET_TEMPT): Likewise.
	(TIOCM_LE, TIOCM_DTR, TIOCM_RTS, TIOCM_ST, TIOCM_SR, TIOCM_CTS,
	TIOCM_CAR, TIOCM_RNG, TIOCM_DSR, TIOCM_CD, TIOCM_RI): Remove as
	these are already provided in bits/ioctl-types.h
Merge remote-tracking branch 'origin/roland/nptl-alpha'
alpha: Create __syscall_nocancel entry points
Fix sparc memcpy data corruption when using niagara2 optimized routines.

	* sysdeps/sparc/sparc64/multiarch/memcpy-niagara2.S: Add missing
	membar to avoid block loads/stores to overlap previous stores.