[Debian GNUstep maintainers] Bug#1121292: wlmaker FTBFS: PkgConfig::WLROOTS was not found

[Jeremy Bícha]

Control: reopen -1

wlmaker needs to use wlroots 0.19 because wlroots 0.18 is no longer
built from source.

The bug pointed to

https://github.com/phkaeser/wlmaker/commit/31d6e6006

Thank you,
Jeremy Bícha