apparmor: clarify CRYPTO dependency

The crypto framework can be built as a loadable module, but the
apparmor hash code can only be built-in, which then causes a
link error:

security/built-in.o: In function `aa_calc_profile_hash':
integrity_audit.c:(.text+0x21610): undefined reference to `crypto_shash_update'
security/built-in.o: In function `init_profile_hash':
integrity_audit.c:(.init.text+0xb4c): undefined reference to `crypto_alloc_shash'

This changes Apparmor to use 'select CRYPTO' like a lot of other
subsystems do.

Signed-off-by: Arnd Bergmann <[e-mail]>
Acked-by: John Johansen <[e-mail]>
Signed-off-by: James Morris <[e-mail]>

security/apparmor/Kconfig

···
 config SECURITY_APPARMOR_HASH
 	bool "SHA1 hash of loaded profiles"
 	depends on SECURITY_APPARMOR
-	depends on CRYPTO
+	select CRYPTO
 	select CRYPTO_SHA1
 	default y