Do not build 'cipher/' assembly files when --disable-asm used
* configure.ac: Collect assembly implementation *.lo files under GCRYPT_ASM_CIPHERS and GCRYPT_ASM_DIGEST for --disable-asm selection.
- GnuPG-bug-id: T5694
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>