Bug#908600: libdazzle: build tests fail on non-Linux

[Jeremy Bicha <jbicha@debian.org>]

Source: libdazzle
Version: 3.28.1-1
Severity: important
User: debian-bsd@lists.debian.org
Usertags: kfreebsd
X-Debbugs-CC: debian-bsd@lists.debian.org, debian-hurd@lists.debian.org

libdazzle's build test fails on non-Linux.

The particular test is testing these functions which are commented as
Linux-only.

https://gitlab.gnome.org/GNOME/libdazzle/blob/master/src/files/dzl-recursive-file-monitor.c

GNOME Builder appears to use these functions.
https://gitlab.gnome.org/GNOME/gnome-builder/blob/master/src/libide/vcs/ide-vcs-monitor.c

Thanks,
Jeremy Bicha