docs/fiddle: add "incomplete" fiddle.

Change-Id: I66246d6c421cf91b459207d91e4899c4c030e45e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/248159
Reviewed-by: Ben Wagner aka dogben <benjaminwagner@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
diff --git a/tools/fiddle/all_examples.cpp b/tools/fiddle/all_examples.cpp
index ea8d5fd..c3148d3 100644
--- a/tools/fiddle/all_examples.cpp
+++ b/tools/fiddle/all_examples.cpp
@@ -1071,3 +1071,4 @@
 #include "../../docs/examples/Text_Skew_X.cpp"
 #include "../../docs/examples/Typeface_Methods.cpp"
 #include "../../docs/examples/Xor.cpp"
+#include "../../docs/examples/incomplete.cpp"