But yes I believe them being punished for a crime doesn't mean their human rights be breached. There was perhaps even no need for separate kitchen except on the day pork is served the prisoners be forewarned.
I agree with Marco than committing a crime that lands you in jail is sinful enough, however they are serving their time for that. Doesn't mean they are now doomed to eternal hell so eating pork is fine. Besides try doing the same to prisoners of other faiths and the reaction would be the same.
That said I don't think they should be compensated since it was a mistake. The authorities should be reprimanded and made to take precautions in the future, and maybe issue a formal apology.