Add AVX2 version of ConvolveVertically

src/opts/SkOpts_hsw.cpp

Index: src/opts/SkOpts_hsw.cpp
diff --git a/src/opts/SkOpts_hsw.cpp b/src/opts/SkOpts_hsw.cpp
index 12bc49444fd9f0ce8a61ae82e400db9f709bf068..d0845c58f7c41fb58aed6216a9ab0a4d83615641 100644
--- a/src/opts/SkOpts_hsw.cpp
+++ b/src/opts/SkOpts_hsw.cpp
@@ -9,6 +9,7 @@
 #include "SkOpts.h"
 
 #define SK_OPTS_NS hsw
+#include "SkBitmapFilter_opts.h"
 #include "SkRasterPipeline_opts.h"
 
 #if defined(_INC_MATH) && !defined(INC_MATH_IS_SAFE_NOW)
@@ -19,6 +20,7 @@ namespace SkOpts {
     void Init_hsw() {
         run_pipeline     = hsw::run_pipeline;
         compile_pipeline = hsw::compile_pipeline;
+        convolve_vertically = hsw::convolve_vertically;
     }
 }