Add C knucleotide program

[JZerf]

This program should be considerably faster than the current fastest program and this should also use noticeably less memory as well.

It looks like there currently is an existing problem where programs that use OpenMP (like this one as well as apparently the existing binarytrees and spectralnorm programs) have linking issues when used with "zig cc". Because of this issue, I added commented out entries for this program to the bench_c_zig.yaml file and also included a short comment about the linking issue so people know why it was commented out. Adding "-lomp5" to the app.rsp file might fix this issue but I'm new to this project and how it works plus I'm not much of an expert at dealing with linking issues so I didn't want to try fixing this yet.

[hanabi1224]

Thanks, but looks like it has some kind of dead lock or very bad performance. The C tests used to finish in 3~5 seconds

Update: the problem here takes file input instead of stdin, I believe that's what causes deadlock

[JZerf]

Sorry about that. You're right about it reading from stdin instead of the file that was specified as a command line argument. I was having a little trouble at first getting the build step to work and then forgot that there were test and bench steps that I should have ran too so I didn't see that it had a problem. I've made a new commit to correct the program.

On a side note, on my computer the test and bench steps displayed an error saying that an operation was not permitted while trying to add the execute permission to the GCC compiled program. I checked the file afterwards and it was owned by root and already had the execute permission. Other than that it looks like both steps completed successfully.