Fix tests.

test/parse/builtin_types.golden

@@ -0,0 +1,27 @@
+(program	
+ (fun vertex vs_main
+  [] 
+  (:= v2 float2 (float2 2 2)) 
+  (= v2 (float2 2)) 
+  (= v2 (float2 v2)) 
+  (:= v3 float3 (float3 2 2 2)) 
+  (= v3 (float3 v2 1)) 
+  (= v3 (float3 1 v2)) 
+  (= v3 (float3 1)) 
+  (= v3 (float3 v3)) 
+  (:= v4 float4 (float4 2 2 2 2)) 
+  (= v4 (float4 v4)) 
+  (= v4 (float4 v2 v2)) 
+  (= v4 (float4 v2 1 1)) 
+  (= v4 (float4 1 v2 1)) 
+  (= v4 (float4 1 1 v2)) 
+  (= v4 (float4 v3 2)) 
+  (= v4 (float4 2 v3)) 
+  (= v4 (float4 2)) 
+  (= v4 (float4 1 1 v2)) 
+  (= v4 (float4 2)) 
+  (= v2.x 2) 
+  (= v2.y 2) 
+  (:= p (+ v2.x v3.z)) 
+  (:= q (+ v4.w v2.x)) 
+  (:= m float4x4)))