From: Ivan Kokshaysky <ink@jurassic.park.msu.ru>

Recent syscall stubs cleanup broke alpha, as it has its own version of
sys_rt_sigaction().  This defines __ARCH_WANT_SYS_RT_SIGACTION for all
architectures except alpha, sparc and sparc64.
Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>