ldns: add option to install with GOST support

By default, ldns is installed without support for the GOST family
of crypto algorithms, since that support requires a newer version
of OpenSSL than that included with OSX. This commit adds an
option to the recipe that turns on GOST support and adds a
dependency on Homebrew-provided OpenSSL.

Closes #25207.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>