disable test for noMMU

test/stdlib/Makefile.in

@@ -5,3 +5,7 @@ DODIFF_qsort       := 1
 DODIFF_testatexit  := 1
 DODIFF_teston_exit := 1
 DODIFF_teststrtol  := 1
+
+ifeq ($(ARCH_USE_MMU),)
+TESTS_DISABLED := test-mkostemp-O_CLOEXEC
+endif