Update gtest to explicitly size gl_PrimitiveIndicesNV[]

Test/spv.meshShaderRedeclBuiltins.mesh

@@ -22,16 +22,16 @@ out gl_MeshPerVertexNV {
     float gl_PointSize;
     float gl_ClipDistance[4];
     float gl_CullDistance[4];
-} gl_MeshVerticesNV[MAX_VER];       // explicitly sized to MAX_VER
+} gl_MeshVerticesNV[MAX_VER];                   // explicitly sized to MAX_VER
 
 perprimitiveNV out gl_MeshPerPrimitiveNV {
     int gl_PrimitiveID;
     int gl_Layer;
     int gl_ViewportIndex;
     int gl_ViewportMask[];
-} gl_MeshPrimitivesNV[];            // implicitly sized to MAX_PRIM
+} gl_MeshPrimitivesNV[];                        // implicitly sized to MAX_PRIM
 
-out uint gl_PrimitiveIndicesNV[];   // explicitly sized to MAX_PRIM * 3
+out uint gl_PrimitiveIndicesNV[MAX_PRIM*3];     // explicitly sized to MAX_PRIM * 3
 
 void main()
 {