[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/alert.vert

@@ -0,0 +1,21 @@
+#version 300 es
+
+layout(location = 0) in vec3 vertexPosition_modelspace;
+layout(location = 1) in vec2 vertexUV;
+
+uniform vec2 screen;
+uniform vec2 size;
+uniform vec4 color;
+
+out highp vec2 uv;
+out highp vec4 c;
+
+void main()
+{
+  gl_Position.xyz = vertexPosition_modelspace;
+  gl_Position.w   = 1.0;
+  gl_Position.xy *= screen.xy * size.xy;
+
+  uv = vertexUV;
+  c  = color;
+}