Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/waitpid.c

Index: src/untrusted/nacl/stubs/waitpid.c
diff --git a/src/untrusted/nosys/waitpid.c b/src/untrusted/nacl/stubs/waitpid.c
similarity index 83%
rename from src/untrusted/nosys/waitpid.c
rename to src/untrusted/nacl/stubs/waitpid.c
index 9067ba2d7e6b52932f1dce9a43e680cd3ee0672a..0057f2066495ce250f0bb7bf7f6ec79544968e79 100644
--- a/src/untrusted/nosys/waitpid.c
+++ b/src/untrusted/nacl/stubs/waitpid.c
@@ -17,6 +17,3 @@ pid_t waitpid(pid_t pid, int *status, int options) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(waitpid);