It used to be that APPLE_COMMON_CRYPTO did nothing when BLK_SHA1 was
set. But APPLE_COMMON_CRYPTO is now used for more than just SHA1 (see 3ef2bca) so make sure that the appropriate libraries are always set.
Signed-off-by: Brian Gernhardt <brian@gernhardtsoftware.com> Reviewed-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>