Added sample for VK_EXT_descriptor_buffer

Work-in-progress

data/shaders/glsl/descriptorbuffer/cube.vert

@@ -0,0 +1,31 @@
+#version 450
+
+layout (location = 0) in vec3 inPos;
+layout (location = 1) in vec3 inNormal;
+layout (location = 2) in vec2 inUV;
+layout (location = 3) in vec3 inColor;
+
+layout (set = 0, binding = 0) uniform UBOCamera {
+	mat4 projection;
+	mat4 view;
+} camera;
+
+layout (set = 1, binding = 0) uniform UBOModel {
+	mat4 matrix;
+} model;
+
+layout (location = 0) out vec3 outNormal;
+layout (location = 1) out vec3 outColor;
+layout (location = 2) out vec2 outUV;
+
+out gl_PerVertex {
+	vec4 gl_Position;
+};
+
+void main() 
+{
+	outNormal = inNormal;
+	outColor = inColor;
+	outUV = inUV;
+	gl_Position = camera.projection * camera.view * model.matrix * vec4(inPos.xyz, 1.0);
+}