Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/chown.c

Index: src/untrusted/nacl/stubs/chown.c
diff --git a/src/untrusted/nosys/chown.c b/src/untrusted/nacl/stubs/chown.c
similarity index 83%
rename from src/untrusted/nosys/chown.c
rename to src/untrusted/nacl/stubs/chown.c
index de9859dbd9526ecd1ca4757da0f8fb19dc72b106..3c6ba211d98325464e254042bf50ae8a7774c2e3 100644
--- a/src/untrusted/nosys/chown.c
+++ b/src/untrusted/nacl/stubs/chown.c
@@ -17,6 +17,3 @@ int chown(const char *path, uid_t owner, gid_t group) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(chown);