gitian: upgrade OpenSSL to 1.0.1h

Upgrade for https://www.openssl.org/news/secadv_20140605.txt

Just in case - there is no vulnerability that affects ecdsa signing or verification.

The MITM attack vulnerability (CVE-2014-0224) may have some effect on our usage of SSL/TLS.

As long as payment requests are signed (which is the common case), usage of the payment protocol should also not be affected.

The TLS usage in RPC may be at risk for MITM attacks. If you have `-rpcssl` enabled, be sure to update OpenSSL as soon as possible.

(do not merge yet, I'm gitian build is in process here to update the intermediate checksums in doc/release-notes.md)