games/cockatrice

• Update to 2.7.5
• Changelog/Release Notes:
  • https://github.com/Cockatrice/Cockatrice/releases
• Upstream did not bump the version, include that as a local patch.
• Upstream does not required two of our local patches, drop them.

Reviewed by: lwhsu
Differential Revision: https://reviews.freebsd.org/D26170