Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/sigprocmask.c

Index: src/untrusted/nacl/stubs/sigprocmask.c
diff --git a/src/untrusted/nosys/sigprocmask.c b/src/untrusted/nacl/stubs/sigprocmask.c
similarity index 82%
rename from src/untrusted/nosys/sigprocmask.c
rename to src/untrusted/nacl/stubs/sigprocmask.c
index 9e81c3bd67ddbd07ff38d27401d960c313403655..548a7419bc7bd5eac7016a44588bced6794dfb3b 100644
--- a/src/untrusted/nosys/sigprocmask.c
+++ b/src/untrusted/nacl/stubs/sigprocmask.c
@@ -16,6 +16,3 @@ int sigprocmask(int how, const sigset_t *set, sigset_t *oldset) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(sigprocmask);