support _POSIX_REALTIME_SIGNALS

Bug: 18489947
Change-Id: I2e834d68bc10ca5fc7ebde047b517a3074179475
diff --git a/libc/SYSCALLS.TXT b/libc/SYSCALLS.TXT
index 39ff37d..35558c9 100644
--- a/libc/SYSCALLS.TXT
+++ b/libc/SYSCALLS.TXT
@@ -223,6 +223,7 @@
 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     __rt_sigqueueinfo:rt_sigqueueinfo(pid_t, int, siginfo_t*)  all
 int     __signalfd4:signalfd4(int, const sigset_t*, size_t, int)  all
 
 # sockets