python/regress: Fix vertex shader XPD test.

src/gallium/state_trackers/python/tests/regress/vertex-shader/vert-xpd.sh

@@ -5,7 +5,7 @@ DCL IN[1], COLOR
 DCL OUT[0], POSITION
 DCL OUT[1], COLOR
 
-XPD OUT[0], IN[0], IN[1]
-MOV OUT[1], IN[1]
+MOV OUT[0], IN[0]
+XPD OUT[1], IN[0], IN[1]
 
 END