Fix sigsuspend to use rt_sigsuspend on all platforms.

Change-Id: I981c1a66d35480d4457a0a08a1b042dac94daa5b
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index cea1878..0d1e808 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -233,14 +233,12 @@
 
 # signals
 int     sigaction(int, const struct sigaction*, struct sigaction*)  arm,x86,mips
-int     __sigsuspend:sigsuspend(int unused1, int unused2, unsigned mask)  arm,x86
-int     __sigsuspend:sigsuspend(const sigset_t* mask)  mips
-int     __rt_sigsuspend:rt_sigsuspend(const sigset_t *unewset, size_t sigset_size)  x86_64
-int     __rt_sigaction:rt_sigaction(int sig, const struct sigaction* act, struct sigaction* oact, size_t sigsetsize)  all
-int     __rt_sigprocmask:rt_sigprocmask(int  how, const sigset_t* set, sigset_t* oset, size_t sigsetsize)  all
-int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t* set, struct siginfo_t* info, struct timespec_t* timeout, size_t  sigset_size)  all
 int     sigpending(sigset_t*)  arm,x86,mips
-int     signalfd4(int fd, const sigset_t* mask, size_t sizemask, int flags)  all
+int     __rt_sigaction:rt_sigaction(int, const struct sigaction*, struct sigaction*, size_t)  all
+int     __rt_sigprocmask:rt_sigprocmask(int, const sigset_t*, sigset_t*, size_t)  all
+int     __rt_sigsuspend:rt_sigsuspend(const sigset_t*, size_t)  all
+int     __rt_sigtimedwait:rt_sigtimedwait(const sigset_t*, struct siginfo_t*, struct timespec_t*, size_t)  all
+int     signalfd4(int, const sigset_t*, size_t, int)  all
 
 # sockets
 int           socket(int, int, int)              arm,mips,x86_64
@@ -296,7 +294,7 @@
 # other
 int     uname(struct utsname*)  all
 mode_t  umask(mode_t)  all
-int      __reboot:reboot(int, int, int, void*)  all
+int     __reboot:reboot(int, int, int, void*)  all
 int     __syslog:syslog(int, char*, int)  all
 int     init_module(void*, unsigned long, const char*)  all
 int     delete_module(const char*, unsigned int)   all