rgw: civetweb/openssl: Load libssl.so and libcrypto.so by soname.

rgw: civetweb/openssl: Load libssl.so and libcrypto.so by soname.

If building with radosgw, always look for openssl library (even when
building with nss).  Then, use objdump to fetch SONAME from the copies
of libssl and libcrypto that were found.  When building civetweb; pass
the library soname values in as the libraries to load with "dlopen".

This is a problem that went away for a bit, but came back with some
changes for
http://tracker.ceph.com/issues/16535

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1341775
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1258961
Fixes: http://tracker.ceph.com/issues/11239
Signed-off-by: Marcus Watts <mwatts@redhat.com>