Add mineclone2 in the list

[supermamie]

Problem

• mineclone2 was available, but not in the install list

Solution

• I added it

PR Status

• [ ] Code finished and ready to be reviewed/tested
• [ ] The fix/enhancement were manually tested (if applicable)

Automatic tests

Automatic tests can be triggered on https://ci-apps-dev.yunohost.org/ after creating the PR, by commenting "!testme", "!gogogadgetoci" or "By the power of systemd, I invoke The Great App CI to test this Pull Request!". (N.B. : for this to work you need to be a member of the Yunohost-Apps organization)

Note : I do not know why but there are many commits between my repo and this one, so all 4 of them should be merged in just one.

[ericgaspar]

ah yes sorry, I forgot to add this. Is this ready to merge?