Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/ftruncate.c

Index: src/untrusted/nacl/stubs/ftruncate.c
diff --git a/src/untrusted/nosys/ftruncate.c b/src/untrusted/nacl/stubs/ftruncate.c
similarity index 82%
rename from src/untrusted/nosys/ftruncate.c
rename to src/untrusted/nacl/stubs/ftruncate.c
index c4fca22baf7aebb5ebfe0025bb7891f8f644bc97..2e33f13ab07e32a12eae10d9e00c651e2903d153 100644
--- a/src/untrusted/nosys/ftruncate.c
+++ b/src/untrusted/nacl/stubs/ftruncate.c
@@ -17,6 +17,3 @@ int ftruncate(int fd, off_t length) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(ftruncate);