Fix sigsuspend to use rt_sigsuspend on all platforms.

Change-Id: I981c1a66d35480d4457a0a08a1b042dac94daa5b
diff --git a/libc/Android.mk b/libc/Android.mk
index b9db201..88be78d 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -184,7 +184,6 @@
     bionic/fstatfs.c \
     bionic/__get_tls.cpp \
     bionic/lseek64.c \
-    bionic/sigsuspend.c \
     bionic/statfs.c \
 
 endif
@@ -248,6 +247,7 @@
     bionic/setlocale.cpp \
     bionic/signalfd.cpp \
     bionic/sigprocmask.cpp \
+    bionic/sigsuspend.cpp \
     bionic/sigwait.cpp \
     bionic/statvfs.cpp \
     bionic/strerror.cpp \