ARM Skia NEON patches - 32 - Xfermode: 1-pixel NEON modeprocs

src/opts/SkXfermode_opts_none.cpp

 #include "SkXfermode.h"
 #include "SkXfermode_proccoeff.h"
 
-// The prototype below is for Clang
+// The prototypes below are for Clang
 extern SkProcCoeffXfermode* SkPlatformXfermodeFactory(const ProcCoeff& rec,
                                                       SkXfermode::Mode mode);
 
+extern SkXfermodeProc SkPlatformXfermodeProcFactory(SkXfermode::Mode mode);
+
 SkProcCoeffXfermode* SkPlatformXfermodeFactory(const ProcCoeff& rec,
                                                SkXfermode::Mode mode) {
     return NULL;
 }
+
+SkXfermodeProc SkPlatformXfermodeProcFactory(SkXfermode::Mode mode) {
+    return NULL;
+}