tests: only test crypt if we have an impl

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

test/Makefile

@@ -35,7 +35,7 @@ endif
 ifneq ($(UCLIBC_HAS_LOCALE),y)
 	DIRS := $(filter-out locale,$(DIRS))
 endif
-ifneq ($(UCLIBC_HAS_CRYPT),y)
+ifneq ($(UCLIBC_HAS_CRYPT_IMPL),y)
 	DIRS := $(filter-out crypt,$(DIRS))
 endif
 ifeq ($(HAS_NO_THREADS),y)