Add sha384/sha512 generation to Makefile.
Add sha384/sha512 generation to Makefile.

This change was accidentally not committed as part of 1a10bdd5fcc326e7aac8ab68eef8e2c3d65f2996.

marumari/badssl.com,chromium/badssl.com,marumari/badssl.com,marumari/badssl.com,chromium/badssl.com,chromium/badssl.com,chromium/badssl.com,marumari/badssl.com