port from perforce

hgplus/ShaderMinifier/tests/real/gfx monitor/gradation.fs

@@ -0,0 +1,10 @@
+// FragmentProgram
+
+varying vec4 p;
+
+void main()
+{
+	float g = p.y * 0.5 + 0.5;
+	gl_FragColor = vec4(g,g,g,0);
+	return;
+}