[client] use cmake to generate renderers/fonts/clipboards headers/code

This is in preperation of cmake options to enable/disable various
functionallity.

client/renderers/EGL/shader/desktop.vert

@@ -0,0 +1,20 @@
+#version 300 es
+
+layout(location = 0) in vec3 vertexPosition_modelspace;
+layout(location = 1) in vec2 vertexUV;
+
+uniform vec4 position;
+
+out highp vec2 uv;
+
+void main()
+{
+  gl_Position.xyz = vertexPosition_modelspace; 
+  gl_Position.w   = 1.0;
+  gl_Position.x  -= position.x;
+  gl_Position.y  -= position.y;
+  gl_Position.x  *= position.z;
+  gl_Position.y  *= position.w;
+
+  uv = vertexUV;
+}