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* configure.ac (asm_path): Recognize "x86", in addition to "i?86",
for 32-bit x86 processors. Reportedly needed for x86 android builds.

Add CFB variant with 8-bit segment size.
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>

* cbc.c (cbc_decrypt): For in-place operation (src == dst case),
eliminate use of src variable.
* cfb.c (cfb_decrypt): Likewise.
* gcm.c (gcm_crypt): Likewise, and replace one memxor3 by memxor.

Dated 2017-08-27.

Was broken by rename of configure variable GMP_NUMB_BITS -->
NUMB_BITS.

Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>

This avoids the need to install packages during check, and
reduces failures due to infrastructure.
Signed-off-by: Nikos Mavrogiannopoulos <nmav@redhat.com>