[CRYPTO] tcrypt: Add missing Kconfig dependency on BLKCIPHER

Building latest git fails with the following error:
	ERROR: "crypto_alloc_ablkcipher" [crypto/tcrypt.ko] undefined!
This appears to happen because CONFIG_CRYPTO_TEST is set while
CONFIG_CRYPTO_BLKCIPHER is not.
The following patch fixes the problem for me.
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/Kconfig

@@ -567,6 +567,7 @@ config CRYPTO_TEST
 	depends on m
 	select CRYPTO_ALGAPI
 	select CRYPTO_AEAD
+	select CRYPTO_BLKCIPHER
 	help
 	  Quick & dirty crypto test module.