Shaders: expand Flat UBO construction tests a bit.

src/Magnum/Shaders/Test/FlatGLTest.cpp

@@ -217,7 +217,8 @@ constexpr struct {
     /* SwiftShader has 256 uniform vectors at most, per-draw is 4+1 in 3D case
        and 3+1 in 2D, per-material 2 */
     {"multiple materials, draws", FlatGL2D::Flag::UniformBuffers, 8, 48},
-    {"texture transformation", FlatGL2D::Flag::UniformBuffers|FlatGL2D::Flag::Textured|FlatGL2D::Flag::TextureTransformation, 1, 1},
+    {"textured", FlatGL2D::Flag::UniformBuffers|FlatGL2D::Flag::Textured, 1, 1},
+    {"textured + texture transformation", FlatGL2D::Flag::UniformBuffers|FlatGL2D::Flag::Textured|FlatGL2D::Flag::TextureTransformation, 1, 1},
     {"alpha mask", FlatGL2D::Flag::UniformBuffers|FlatGL2D::Flag::AlphaMask, 1, 1},
     {"object ID", FlatGL2D::Flag::UniformBuffers|FlatGL2D::Flag::ObjectId, 1, 1},
     {"multidraw with all the things", FlatGL2D::Flag::MultiDraw|FlatGL2D::Flag::TextureTransformation|FlatGL2D::Flag::Textured|FlatGL2D::Flag::AlphaMask|FlatGL2D::Flag::ObjectId|FlatGL2D::Flag::InstancedTextureOffset|FlatGL2D::Flag::InstancedTransformation|FlatGL2D::Flag::InstancedObjectId, 8, 48}