community/zathura: add synctex support

This is a follow up from my request #13378 (closed) to add synctex support for Zathura. Test failed when I built it locally, but the package seems to work in my machine. Thanks @psykose for !29220 (merged).

Judging from https://github.com/latex-lsp/texlab/blob/master/docs/previewing.md and https://archlinux.org/packages/extra/x86_64/libsynctex/ we possibly can also add synctex support for Evince, Atril and Okular.