Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/setuid.c

Index: src/untrusted/nacl/stubs/setuid.c
diff --git a/src/untrusted/nosys/setuid.c b/src/untrusted/nacl/stubs/setuid.c
similarity index 82%
rename from src/untrusted/nosys/setuid.c
rename to src/untrusted/nacl/stubs/setuid.c
index fa736573191d32aa7933b1fa73b036d55edbb84f..d4b00aabd0f614fb29da889973fc2df334b704e0 100644
--- a/src/untrusted/nosys/setuid.c
+++ b/src/untrusted/nacl/stubs/setuid.c
@@ -17,6 +17,3 @@ int setuid(uid_t uid) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(setuid);