If locale support is not enabled, don't build 'tst_ftime_l'.

test/time/Makefile

@@ -4,6 +4,10 @@
 TESTS_DISABLED := bug-asctime bug-asctime_r time tst-mktime2 tst-posixtz \
 	tst-strftime tst-strptime tst-timezone
 
+ifneq ($(UCLIBC_HAS_LOCALE),y)
+TESTS_DISABLED += tst-ftime_l
+endif
+
 include ../Test.mak
 
 CFLAGS_tst-strptime2 := -std=c99