resources: orgainize directory.

Should make it easier to ask just for images.

Change-Id: If821743dc924c4bfbc6b2b2d29b14affde7b3afd
Reviewed-on: https://skia-review.googlesource.com/82684
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
diff --git a/bench/ImageFilterDAGBench.cpp b/bench/ImageFilterDAGBench.cpp
index 076e139..76b091f 100644
--- a/bench/ImageFilterDAGBench.cpp
+++ b/bench/ImageFilterDAGBench.cpp
@@ -58,7 +58,7 @@
     }
 
     void onDelayedSetup() override {
-        fImage = GetResourceAsImage("mandrill_512.png");
+        fImage = GetResourceAsImage("images/mandrill_512.png");
     }
 
     void onDraw(int loops, SkCanvas* canvas) override {