Update argon2 to rev 7 via SR 803288
    
    https://build.opensuse.org/request/show/803288
    by user namtrac + dimstar_suse
    - Update to version 0.0+git20190520.62358ba (boo#1170512):
      * Fix the Makefile to install libargon2.pc.
      * Wait for already running threads if a thread creation failed.
      * Added Argon2 Erlang binding.
      * Additional JVM bindings (Jargon2).