Reduce number of glyphs drawn by fontscaler GM to avoid N4 MSAA4 crash

gm/fontscaler.cpp

Index: gm/fontscaler.cpp
diff --git a/gm/fontscaler.cpp b/gm/fontscaler.cpp
index 59b1a4322bce5f6498222aa1a5d713d023eafe7d..33f6779d2c295577432e78e988385e5b94ff170a 100644
--- a/gm/fontscaler.cpp
+++ b/gm/fontscaler.cpp
@@ -49,7 +49,8 @@ protected:
         const size_t textLen = strlen(text);
 
         for (int j = 0; j < 2; ++j) {
-            for (int i = 0; i < 6; ++i) {
+            // This used to do 6 iterations but it causes the N4 to crash in the MSAA4 config.
+            for (int i = 0; i < 5; ++i) {
                 SkScalar x = SkIntToScalar(10);
                 SkScalar y = SkIntToScalar(20);