skia: blend32_16_row for neon version

src/opts/opts_check_x86.cpp

Index: src/opts/opts_check_x86.cpp
diff --git a/src/opts/opts_check_x86.cpp b/src/opts/opts_check_x86.cpp
index 84041d05b0c8ba32494431f5c3c7ac1d94b9f854..02e0aa7e837be3865aa1fc5ee2b676ac2dea9bbc 100644
--- a/src/opts/opts_check_x86.cpp
+++ b/src/opts/opts_check_x86.cpp
@@ -254,6 +254,10 @@ SkBlitRow::Proc32 SkBlitRow::PlatformProcs32(unsigned flags) {
     }
 }
 
+SkBlitRow::Blend32_16_row_Proc SkBlitRow::PlatformBlend32_16_rowProc() {
+    return NULL;
+}
+
 SkBlitRow::ColorProc SkBlitRow::PlatformColorProc() {
     if (supports_simd(SK_CPU_SSE_LEVEL_SSE2)) {
         return Color32_SSE2;