Add Steam COP shader effects_wallmarks.s

Author: Xottab-DUTY

res/gamedata/shaders/r3/effects_wallmark.s

@@ -0,0 +1,8 @@
+function normal(shader, t_base, t_second, t_detail)
+  shader:begin("effects_wallmark","stub_default_ma")
+		: blend		(true,blend.destcolor,blend.srccolor)
+		: zb 		(true,false)
+	shader:dx10texture	("s_base", t_base)
+	shader:dx10sampler	("smp_base")
+	shader: dx10color_write_enable( true, true, true, false)
+end