#10157 Fixes manifest generation on jvm target

[davidbruce]

Original issue: #10157

Changes class-path generation for jvm to multiple lines to fix jars with a lot of libraries.

Works on MacOS and Linux, unfortunately I am not able to to test this on Windows at this time, but I don't think there should be an issue.

[davidbruce]

I've attempted to fix this, no hard feelings if it isn't what you want, but it's allowing me to get back to work for now.

Also for MacOS I needed to install perl and the String::ShellQuote package to get the opam deps installed properly.

curl -L http://xrl.us/installperlosx | bash
cpan String::ShellQuote

[Simn]

Thanks for looking into this!

Maybe " lib/%s\n" would be better for the indentation, with "\nClass-Path:" ^ (String.concat "" class_paths). But I don't really mind too much as long as it works.

[davidbruce]

I tried " lib/%s\n" initially, but it still didn't work. So, after diffing an old manifest I discovered it needs the space " lib/%s \n". Turns out a manifest is pretty quirky. :P

[Simn]

Oh well, we can always adjust this later. Thanks!