hooks: Add equals-hook for Clojure (clojure.lang.Util.equiv)

[zgtm]

I could have reused assertEquals [L]. But since this is not an assertion-hook, I decided to write a new function in proximity to genericEquals [L].

Also I'm not totally sure, what the meaning of the Boolean areEqual parameter is? (In assertEquals it is called Object alwaysNull and in the ExampleHook it's not defined at all … Ah, I found the documentation in the MethodHook documentation

[fmeum]

Just run ./format.sh to fix the formatting.