tests/main/mkdtemp.c: also try variables TEMP and TMP, not only TMPDIR

tests/main/mkdtemp.c

@@ -31,6 +31,10 @@ int do_test(char *(*func)(char *tmpl))
 	path = starpu_getenv("TMPDIR");
 	if (!path)
 		path = "/tmp";
+	if (!path)
+		path = starpu_getenv("TEMP");
+	if (!path)
+		path = starpu_getenv("TMP");
 	snprintf(dirname, 128, "%s/abcdef_XXXXXX", path);
 	ptr = func(dirname);
 	FPRINTF(stderr, "Directory '%s' (res '%s')\n", dirname, ptr);