Image Build Fails on gapl language setup

[SteveCastle]

When building the image the build scripts call undup(line) in phase2.ejs while installing each language.

undup is a function in index.js that seems to comment out commands in the install array if they are already in the dc array in index.js. It seems like this means commands from previously installed languages would still be in that array including previous make and make install?

This causes the make and make install commands to be commented out, and the apl binary to fail to be created and copied, causing a crash.

I was going to make a PR but I realized I don't really understand the point of the dup check in the first place so I thought I'd just comment.

[SteveCastle]

I actually just removed the undup call from the ejs template to fix it for myself.

[SteveCastle]

Plus it seems like a PR has already been approved to remove the language. I think the issue I mentioned could still happen to other languages though.