OpenSSL: 1.1 fallout - fix configure on old autoconf

OpenSSL: 1.1 fallout - fix configure on old autoconf

Older versions of autoconf generate an empty "else fi" block for empty
fields in an AC_CHECK_FUNCS() macro.  This breaks on e.g. RHEL6.

Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <1487846138-22231-1-git-send-email-steffan.karger@fox-it.com>
URL: http://www.mail-archive.com/search?l=mid&q=1487846138-22231-1-git-send-email-steffan.karger@fox-it.com
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 07372a0fdeb3638204d197d0614f776a0eb73ab9)