Use more explicit include paths.

This helps clarify dependencies and simplifies include paths.

Bug swiftshader:86

Change-Id: I564ee420bb9029fa6428e49b63a86d633301bec2
Reviewed-on: https://swiftshader-review.googlesource.com/13288
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
diff --git a/src/Shader/PixelRoutine.hpp b/src/Shader/PixelRoutine.hpp
index d57f2cb..e9cee79 100644
--- a/src/Shader/PixelRoutine.hpp
+++ b/src/Shader/PixelRoutine.hpp
@@ -15,7 +15,7 @@
 #ifndef sw_PixelRoutine_hpp
 #define sw_PixelRoutine_hpp
 
-#include "QuadRasterizer.hpp"
+#include "Renderer/QuadRasterizer.hpp"
 
 namespace sw
 {