Make mod_ssl consistent with itself when you have a halfass install of

Make mod_ssl consistent with itself when you have a halfass install of
openssl-engine (ie, you're missing the headers).  ssl_cmd_SSLCryptoDevice()
is thrown away by the preprocessor if you're missing the header, so the
call to it should have the same condition applied.  otherwise, mod_ssl
will fail to link.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk/modules/ssl@100970 13f79535-47bb-0310-9956-ffa450edef68