Make libnosys function stubs part of libnacl

src/untrusted/nacl/stubs/geteuid.c

Index: src/untrusted/nacl/stubs/geteuid.c
diff --git a/src/untrusted/nosys/geteuid.c b/src/untrusted/nacl/stubs/geteuid.c
similarity index 81%
rename from src/untrusted/nosys/geteuid.c
rename to src/untrusted/nacl/stubs/geteuid.c
index 740d66b34591d2f608a1c8eb1fffddb251321fba..849e57bb9666534cf7514975ac612e636dfdfa37 100644
--- a/src/untrusted/nosys/geteuid.c
+++ b/src/untrusted/nacl/stubs/geteuid.c
@@ -17,6 +17,3 @@ uid_t geteuid(void) {
   errno = ENOSYS;
   return -1;
 }
-
-#include "native_client/src/untrusted/nosys/warning.h"
-stub_warning(geteuid);