trivial: add tri-stipple to SConscript
diff --git a/progs/trivial/SConscript b/progs/trivial/SConscript
index dc84a05..97820dc 100644
--- a/progs/trivial/SConscript
+++ b/progs/trivial/SConscript
@@ -101,6 +101,7 @@
 	'tri-repeat',
 	'tri-scissor-tri',
 	'tri-stencil',
+	'tri-stipple',
 	'tri-tex',
 	'tri-tex-3d',
 	'tri-tri',