Fix sigsuspend to use rt_sigsuspend on all platforms.

Change-Id: I981c1a66d35480d4457a0a08a1b042dac94daa5b
diff --git a/libc/arch-x86/syscalls.mk b/libc/arch-x86/syscalls.mk
index a704905..10970a6 100644
--- a/libc/arch-x86/syscalls.mk
+++ b/libc/arch-x86/syscalls.mk
@@ -156,11 +156,11 @@
 syscall_src += arch-x86/syscalls/timerfd_settime.S
 syscall_src += arch-x86/syscalls/timerfd_gettime.S
 syscall_src += arch-x86/syscalls/sigaction.S
-syscall_src += arch-x86/syscalls/__sigsuspend.S
+syscall_src += arch-x86/syscalls/sigpending.S
 syscall_src += arch-x86/syscalls/__rt_sigaction.S
 syscall_src += arch-x86/syscalls/__rt_sigprocmask.S
+syscall_src += arch-x86/syscalls/__rt_sigsuspend.S
 syscall_src += arch-x86/syscalls/__rt_sigtimedwait.S
-syscall_src += arch-x86/syscalls/sigpending.S
 syscall_src += arch-x86/syscalls/signalfd4.S
 syscall_src += arch-x86/syscalls/socket.S
 syscall_src += arch-x86/syscalls/bind.S