flush after every print in windows

src/ports/SkDebug_win.cpp

Index: src/ports/SkDebug_win.cpp
diff --git a/src/ports/SkDebug_win.cpp b/src/ports/SkDebug_win.cpp
index e368c9719d41daf0974f33d4ce52899af4d3f8c7..599b133e54eec6f0a86e531ac1366d78b02db727 100644
--- a/src/ports/SkDebug_win.cpp
+++ b/src/ports/SkDebug_win.cpp
@@ -23,6 +23,9 @@ void SkDebugf(const char format[], ...) {
     va_start(args, format);
     vprintf(format, args);
     va_end(args);
+    // When we crash on Windows we often are missing a lot of prints. Since we don't really care
+    // about SkDebugf performance we flush after every print.
+    fflush(stdout);
 
     va_start(args, format);
     vsnprintf(buffer, kBufferSize, format, args);