Temporarily disable gjs tests

gjs is not currently installable on buildds due to the glibc transition
and a long dependency chain involving systemd-shim being preferred over
systemd-sysv, which ends with libnih1 Depends: libc6 (<< 2.26).

debian/rules

@@ -12,6 +12,7 @@ override_dh_autoreconf:
 	env NOCONFIGURE=1 dh_autoreconf ./autogen.sh
 
 configure_options = \
+	GJS=some-nonexistent-gjs-binary \
 	--enable-installed-tests \
 	--libexecdir='$${prefix}/lib' \
 	--with-dracut \