Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/getgid.c

Index: src/untrusted/nacl/stubs/getgid.c
diff --git a/src/untrusted/nosys/getgid.c b/src/untrusted/nacl/stubs/getgid.c
similarity index 81%
rename from src/untrusted/nosys/getgid.c
rename to src/untrusted/nacl/stubs/getgid.c
index a385583a863c20cfa9c130c8117723622f8ba63a..c45f8a668be654fbe968c90549de7e266bee07cb 100644
--- a/src/untrusted/nosys/getgid.c
+++ b/src/untrusted/nacl/stubs/getgid.c
@@ -17,6 +17,3 @@ gid_t getgid(void) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(getgid);