java/bouncycastle15: update 1.55 -> 1.56

port changes:

• upstream updated list of its MASTER_SITES (bouncycastle.gva.es is gone, downloads.bouncycastle.org changed to www.bouncycastle.org);
• pkg-descr updated to reflect current features;
• installation of zipped bundled sources made optional, enabled by default to match previous behavior.

Some of new version changes:

• a new API for DTLS/TLS and a JSSE provider suitable for Java 5 and later;
• support for RFC 7539 ChaCha20 and Poly1305 has also been added and general support for SHA-3 in the PKIX APIs has been improved;

Full details of the release:

PR: 215507
Changes: https://www.bouncycastle.org/releasenotes.html
Security: CVE-2016-1000338, CVE-2016-1000339, CVE-2016-1000340,

		CVE-2016-1000341, CVE-2016-1000342, CVE-2016-1000343,
		CVE-2016-1000344, CVE-2016-1000345, CVE-2016-1000346,
		CVE-2016-1000352

Submitted by: Eugene Grosbein <ports@grosbein.net> (maintainer)