Fix typo in regular Makefile when having coverage files

Makefile

@@ -73,7 +73,7 @@ clean:
 	$(MAKE) -C programs clean
 	$(MAKE) -C tests clean
 ifndef WINDOWS
-	find . \( -name \*.gcno -o -name \*.gcda -o -name *.info \) -exec rm {} +
+	find . \( -name \*.gcno -o -name \*.gcda -o -name \*.info \) -exec rm {} +
 endif
 
 check: lib