[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/splash_logo.frag

@@ -0,0 +1,11 @@
+#version 300 es
+
+out highp vec4 color;
+in  highp float a;
+
+uniform sampler2D sampler1;
+
+void main()
+{
+  color = vec4(1.0, 1.0, 1.0, a);
+}