security/hashcat: update to version 7.1.2

Version 7.0.0 brought many new features:

https://github.com/hashcat/hashcat/releases/tag/v7.0.0

A number of bug fixes and new hash modes have been made available in
minor version upgrades since the release of 7.0.0.

Part of the sources has been re-implemented in Rust and there is a new
Python bridge to allow use of hashcat from Python.

Compilation on i386 has been disabled due to compiler errors for SIMD
instructions.

In a previous commit -O0 was applied to top level source files, due to
build issues on power64le. I have not been able to test whether -O0 is
still required for hashcat 7.x.x.