Build: fix the CI by hard-coding (back) the sasa binary in the test dirs

test/bfs-spanning-tree/Makefile

-# Time-stamp: <modified the 14/05/2019 (at 14:43) by Erwan Jahier>
+# Time-stamp: <modified the 17/05/2019 (at 14:41) by Erwan Jahier>
 
 
-test: test0 lurette0
+test: test0 lurette0 lurette1
 test0: cmxs 
 	$(sasa) -rif -l 200 fig5.1-noinit.dot -sd 
 
@@ -24,12 +24,12 @@ gnuplot2: fig5.2.rif
 
 lurette0:cmxs fig5.1-noinit.lut
 	lurette -o lurette.rif  \
-      -env "sasa fig5.1-noinit.dot -custd -rif" \
+      -env "$(sasa) fig5.1-noinit.dot -custd -rif" \
       -sut "lutin fig5.1-noinit.lut -n distributed"
 
-lurette0bis:cmxs fig5.1-noinit.lut
+lurette1:cmxs fig5.1-noinit.lut
 	rdbg -lurette -o lurette.rif  \
-      -env "sasa fig5.1-noinit.dot -custd -rif" \
+      -env "$(sasa) fig5.1-noinit.dot -custd -rif" \
       -sut "lutin fig5.1-noinit.lut -n distributed"
 
 lurette: lurette0