Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/setgid.c

Index: src/untrusted/nacl/stubs/setgid.c
diff --git a/src/untrusted/nosys/setgid.c b/src/untrusted/nacl/stubs/setgid.c
similarity index 82%
rename from src/untrusted/nosys/setgid.c
rename to src/untrusted/nacl/stubs/setgid.c
index 69fe195a5e19c0bc13567570597e7bb2e912a75f..3b0af14a8f6f55cf10be518ce273e6dea28c196e 100644
--- a/src/untrusted/nosys/setgid.c
+++ b/src/untrusted/nacl/stubs/setgid.c
@@ -17,6 +17,3 @@ int setgid(gid_t gid) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(setgid);