obs-filters: Make crop shader wrap texture

This is mostly so that it can be used with the scroll filter, which uses
identical shaders, but needs to wrap the texture instead of clamp.

plugins/obs-filters/data/crop_filter.effect

@@ -6,8 +6,8 @@ uniform float2 add_val;
 
 sampler_state textureSampler {
 	Filter    = Linear;
-	AddressU  = Clamp;
-	AddressV  = Clamp;
+	AddressU  = Wrap;
+	AddressV  = Wrap;
 };
 
 struct VertData {